I can understand, but let's be honest. Do we have the best place to trade crypto without providing your identification documents? There are a few decentralised exchanges, but they are not very popular. So most people have been using centralised exchanges, and funds have been traced. We can simply cut the transaction by doing a P2P trade. It's not necessary to depend on mixers alone. Exchange can trace only where you withdraw, but they don't know actually who owned the address. Just use multiple addresses and cut the transaction history.
Right now difficult to trade cryptocurrency without providing identification documents except with dapp exchange market such as Uniswap, Pancakeswap and many kinds of dapp exchange. However when using dapp exchange always needed CEX exchange for withdrawing cryptocurrency fund to fiat or cash money trough the bank, use third party but difficult to get which one trusted seller want to buy or cryptocurrency assets and has lower fees transaction such as selling trough P2P on CEX exchange market.
For market exchange easily to trace which one our assets come from, have regulation for all top exchange required identification documents and difficult to get trusted CEX exchange with much volume transaction without required KYC, just small exchange have loer volume transaction and limited amount for withdrawing in daily day.