E.g. coinbase don't let you deposit from mixers (at least in large amounts), but they do let you deposit from okx, which in turn accepts deposits from sketchy chinese exchanges which accept deposits from mixers.
Alternatively, you can go via monero but that only replaces the first few steps in the ladder.
Thankfully I don't think any proposed regulation does much to stop this, short of entirely banning crypto, which I don't see happening any time soon.
Or use something like changelly or a number of decentralized exchanges.
The identity behind a wallet or account might be worthless. Years ago a common scam in Eastern Europe (maybe everywhere) was to pay old or homeless people a tiny fee to open bank accounts all over the city and then hand over the credentials to the criminals. Then they could operate a network of thousands of such accounts for various purposes, sometimes for reasons as simple as getting a small loan that doesn’t require any collateral and disappearing with the money.
This can work as long as they can move around the crypto in an obscure enough way so that it takes just hours or days longer for the authorities to trace than it takes for the criminals to cash out.