If Bank of America let anyone in the world easily open a checking account, this wouldn’t be a problem right? But they don’t do that, because of regulations and

If Bank of America let anyone in the world easily open a checking account, this wouldn’t be a problem right? But they don’t do that, because of regulations and KYC etc. Similarly, if BoA supported an Ethereum stablecoin but a random bank in Argentina supports a Solana stablecoin, it’s still going to be a pain to transfer money right? I’m struggling to see how this is a blockchain issue rather than a regulatory + agreement on international standard issue.