I didn't say public, they don't need a public blockchain. This is a misunderstanding that many people have who have spent too much time in this space.
The last post was about the possibility to finance a public blockchain, including ICO, validator/ecosystem funds and so on. Which is expensive.
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

I'm here not talking about pilot projects and internal blockchains which do not need access of the general public, see below.
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.
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. Blockchains' main feature is to solve the problem of double spending in a public network.
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).