You brought very little in defense of positivism, so I'm at a lose as to what I can respond with there. What I will say is that, by relying on a macroscopic outcome and declaring that any increase must be caused by the psychiatric field, you ignore the very obvious fact, something positivism constantly struggles with, that the world has changed since the 60's. Is the rise of social media the fault of psychiatry? Is underemployment? How about Fortress Europe?
By most microscopic measurements, clinical psychology is a cure that does help the majority of patients. Both in the long-term and short-term.
That is where we disagree.
Clinical psychology makes people feel better about themselves in the short term, long term there is a distinct lack of evidence of positive outcomes. And a lot of unrepeatable experiments that show positive trends which disappear when looked at more closely.
By any objective standard - suicide rates, lost days of work, self harm, substance abuse, murder, etc. - we are worse off or no better today than in 1960 when we were supposedly emotionally stunted and oppressed. Every extra dollar spent on psychology/psychiatry since then has been a waste.
That's not even touching on the crisis of reproducibility that has made a mockery of the entire field and put it somewhere between catholic confessionals and recreational drug use in terms evidence based outcomes.