The scam comes from people with bad intentions, not from service, how they will do it is a completely different matter.
No, the scam is the "service: itself: There is no privacy offered to users of "mixing sites", the operator has complete visibility into the source and destination of all transactions, just like the traditional banking system.
Wasn't there a case of scam by the Wasabi coordinator a few months ago?
A coordinator abused a bug to bypass a customizable fee limit added in a new release to charge the maximum allowed fee of 1%. So it was 1% of a scam I guess.
Also, you are taking the administrator's statement from 5 years ago, various things happened in the meantime. So, for example, Wasabi no longer has the Coinjoin function, it also does an AML check, which can no longer be classified in the context of what the admin wrote.
Wasabi still has the coinjoin function and doesn't do an AML check.