I am convinced that you are somewhat naive. I don't believe that the use of crypto for money laundering is pervasive, but I'd be rather astonished to learn that it just plain does not occur.

Of course, I also believe that 'money laundering' laws criminalize perfectly legitimate behavior, and are a travesty of justice. Not to mention a huge burden on society, and an illegitimate excuse for all sorts of surveillance (i.e., spying) usurpations of rights.