How can you even launder money with NFTs when all transactions are tracked on the blockchain?

Every day on Twitter I see people saying that NFTs are just used for laundering money but how would that even work? Like if every ETH transaction is recorded on the blockchain with specific wallet addresses how could they get away from the watchful eyes of the feds? If this money they're trying to launder is presumably drug money or whatever and it comes in cash wouldn't they have to put all that money in a bank in order to even get it on an exchange? I don't understand.