One need not be an anti psychology zealot to point out that it is not science.
I made the mistake of reading some of Hubbard's sci fi - before I knew he was a cult leader - and he did have an interesting point.
An alien (who looked and acted human) on Earth decided that a psychologist had more power than the police.
The police can arrest you, but you get a trial. In prison they cannot drug you, and you have a defined sentence.
A psychologist can imprison a person based upon saying that person is crazy, they can drug them with whatever they want, and hold them until they decide they are better.
A rather interesting (and scary) proposition - especially if you are a borderline psycho like Hubbard!
I think old L. Ron made a run for the border...and crossed it.