The problem with private blockchains is interoperability with the rest of the ecosystem. Of course they can create one, but then they'll face disadvantages, like not being able to trade on most CEXes without some sort of bridge, and lack of access to DEXes. I recommend to read the whole discussion again

No, there is no interoperability problem if you do not need interoperability. There are many cases in which it is not needed, including building a private blockchain that is going to act as an infrastructure itself. You don't want to run the whole financial networking including stock exchanges on Ethereum, do you?

You probably do not even know how confabulated these existing systems are (both the US and EU), so the chance that they would ever be given away to a public chain is 0.0%. Private companies can do individual projects here and there, but the whole thing is never going into a public non-specialized chain.
I think that you fail to remember that this concept of an real-world enterprise materializing on public random shitcoins is not new, RWA is just the latest example.
No, where did I "fail" to "remember" that? This is of course common practice. And my point is that it brought these companies advantages. Société Générale (as a big bank that has already issued tokens) has their
CoinVertible stablecoins on ETH, Solana, and XRP chains. I think the advantages I've brought up in the last posts and above are the reason why they haven't chosen a private blockchain for that purpose, they even have the resources for a public blockchain of their own.
A stablecoin is nothing but a token, I can create a stablecoin backed by my money in less than 5 minutes. While your example is good, it is not an example that goes deep enough to warrant a private blockchain. To create a whole blockchain just to issue a token for any use would not be smart.
Find me example of pilot projects or ideas that have stayed on public blockchains from the past? There are not more than a handful and tiny concepts that have remained. You can run pilot projects, you do all sorts of things but for the things that a company is usually going to want a blockchain -- it will always be better to run a private blockchain and just do it.
I think we definitely talk about different things. I didn't talk about pilot projects. Of course for pilot projects which do not need interoperability with the existing token ecosystem a private blockchain can be an option. But the question is what remains from the "blockchain" concept in that case if it's only about securing an internal, completely centralized ledger with some hashes.
My intention in the past posts was to bring up the advantages for companies to issue RWA tokens on public, existing blockchains to outsource marketing (due to easier presence on CEXes) and consensus costs. IMO this can be a good option if you want to be present on
that (crypto) market. But in ideal conditions (when the market has decided finally that centralized solutions are better for centralized tokens than blockchains) RWA tokens should end working better in traditional centralized infrastructures. But they won't be present on crypto exchanges, but instead on Robinhood-style microinvesting platforms. They wouldn't really be RWA tokens anymore. Just microinvesting solutions (and these already exist).
The RWA token idea is basically only a good option while we continue in a "market fallacy" which is the current "crypto" or "shitcoin" boom (which can end at any time).
We got ourselves backwards in the understanding here. I was saying that they are going to run pilot projects on public blockchains in order to test the waters, to see how it performs, what they can actually do with it. They are not going to build a private blockchain copycat (or worse, one from scratch) just to run a pilot that will never materialize. There have been thousands of real world pilot projects of various sorts in ETH and many other chains, they have lead to nothing in most cases. Companies retreated or built their own private chains or joined the private chains of others afterwards. RWA is just the latest "hype" and latest concept being tested, most concepts will fail or retreat. As for marketing claims, yes indeed it sounds like a great benefit to run a project in an environment where 99.99% of projects have been scams and most users have been scammed one way or another.

The best projects will be those that run their own private chains or join other private chains, where the blockchain is not exposed to the user at all. They will be doing RWA and gaining the benefits that come from that as a user without even knowing that it is provided as a blockchain. A federated blockchain or private blockchain is superior to a database, even if it does not come with the features of Bitcoin -- and they do not need to, because they fulfill a different use case.
You need to get this a bit through your head. The future is not public blockchains and big names everywhere, the user does not need to know anything about blockchains for these private and centralized projects such as RWA projects. Most of the humans in the world are part of the financial system in the developed world, and not even 0.01% have any clue how it works and what the infrastructure is. That is the future of these projects. It is basically rebuilding a fragile, old, and messed up system through the blockchain concept.
If it is just issuing a token, they can do that on any shitcoin chain as long as they have all the permissions on as it gives them full control over it. If it is more than that and they need additional guarantees against fraud and hacks, they need more power and control than a public blockchain will provide them. The financial system is not going to turn it a "oh well, we got hacked there is nothing we can do about it" system.

Blockchains' main feature is to solve the problem of double spending in a public network.
No. That is the main feature of public blockchains, not all blockchains.
Man Jamie Dimon has made so many claims about bitcoin and how bad it is but in the end theyre just saying those things to short the market and make money
You can ignore retards like that, just because somebody's name is famous that does not mean that they have more working braincells than a newborn monkey.