Not just a bank but an unregulated bank tied to all sorts of shady currencies like USDC, Doge etc which has regular outages. That's also ignoring the wild volatility in the value of bitcoin.
€0.01 coins have a volume of ~0.346ml, gold has a density of 19.3g/ml and a current price of 60.89 USD/g, so a eurocent-sized gold coin would be worth 407.02 USD :)
Yeah, but you're still having to pass through Coinbase or any other exchange, and they can remove it from you there. That's the point, if Bitcoin needs an exchange to be functional you're losing all the differential features that Bitcoin has.
Ease of access to and exchange with global marketplaces. I can transfer/trade directly from/to El Salvador without any bank being involved in that transaction.
A bank by any other name is still a bank. Sure there is definitely a legal difference such as deposit insurance and access to their lender of last resort. For the customer however it doesn't matter they still need KYC, the cops can still see their transactions, they still have to ask where the money is from, they can still knock on your door and put your hands in handcuffs. Many of the advantages to people in El Salvador with BTC is avoiding extreme inflation in the national currency. However one does well to note that inflation woes in the Atlantic world actually correlated with a partial deflation of the Bitcoin bubble, so if you're in the EU/US bitcoin is an investment when money is cheap, not a hedge for your money becoming cheap.
If you need to keep your money on an exchange to be able to do transactions, you'll probably still need to go through a bank or exchange or the same thing by any other name.
The only other legal tender in El Salvador is the US Dollar. If, for any reason, you have qualms about the US financial system, especially as someone foreign to the US with little priority in its decision making processes, it might be desirable to opt for a different currency. Is BTC the right currency for their government to bend to that purpose? I guess we'll find out.
What could possibly go wrong!