On the opposite end of that is the plethora of psychiatry/psychology professionals whom are terrible at their profession and are likely causing more harm than good.
I see it along the same lines as brands, your typical Great Value psychologist will greatly underperform the Kirkland psychologist who will greatly underperform the ... and so on.
Then there's the subset of the population whom have been abused in the most horrific ways by psychologists.
Not to counter your point, just as additional discussion.
Sure, I've had my share of issues with therapists, but I think the solution is to fix the therapists, not to YOLO it by self-medicating with weed.