Most "therapy" services are not providing a diagnosis. Diagnosis comes from an evaluation before therapy starts, or sometimes not at all. (You can pay to talk to someone without a diagnosis.)

The prohibition is mainly on accepting any payment for advertised therapy service, if not following the rules of therapy (licensure, AI guidelines).

Likewise for medicine and law.

Many therapy services have the ability to diagnose as therapy proceeds though

After a bit of consideration I’m actually ok with codifying Bad Ideas. We could expand this.