Even psychotherapy and his own field of psychoanalysis embrace ideas and perspectives that Freud rejected or would have rejected (though the analysts don't like to admit it).
Freud theorized about serious sexual hangups because he was a sick freak! Alfred Adler came up with the inferiority complex because he was crippled. B. F. Skinner wanted to prove that we are all just robots with no free will because he was an atheist and a materialist.