True bitcoiners don't care about any wallets because true bitcoiners run their own full validating nodes, so they are not worried about what the next move of whatever online wallet they are using.
Download a full node on
www.bitcoin.org and stop worrying about online wallets forever. It is worth the time to download the full blockchain.
I understand, and agree with what you are saying, but you missed the whole point of the article. There are many out there creating FUD, to cause panic in the market.
No, I think he got the point of the article. It claimed:
Of course, any Bitcoin wallet is going to suffer from the very same problems as a bank account for your fiat money: It is subject to vanishing into digital oblivion or being seized by the “wallet” service at any time, with absolutely no recourse for the owner.
...Which is just an outright lie.
We can debate about whether Coinbase has been seizing users' accounts or not (occasionally they do if they suspect the users of illegal or suspicious activity, because they're a centralised service and can do this), but what's important is that a
real Bitcoin wallet is trustless and cannot be seized unless a third party which you are
not trusting gets access to your private keys.
This is more comparable to people coming into your house and taking physical cash than it is to a bank account. Sometimes it's even safer than that, depending on what security measures you use with your wallet.