I was just responding to the specific question I quoted. More broadly I agree with you that it's a risky idea to immortalize your criminal activity on a public, immutable ledger.
If your devices are compromised or you ever make a mistake, you can identify yourself.
Even if your opsec is perfect, any transaction partner can identify you.
The problem with the public ledger is that it is, well, public and permanent — maybe you're able to fly under the radar for years, but then your records turn up in an exchange's data breech or an investigation into the services you're using to launder real money, etc. and then your full history is revealed detailing exactly how much money you weren't paying in taxes.
