OK, you may be right about the Psych NPs not needing experience, but that is only because we, as a society, don't give a rat's arse about this population.
I know a couple of these non experienced Psych NPs, and they are just horrid.
They often become mules for various street drugs, to include seroquel, the poor man's heroin, and of course all the benzo's and stimulants.
There was a lawsuit some 10 years ago against a Psych NP at an Ivy League school, after an 18 y/o there committed suicide.
The young man had never been diagnosed with ADHD as a child, and he was valedictorian of his small town class.
He got to college, and suddenly started worrying about his ability to compete as a small fish in a big pond. It was easy to read about ADHD online to know the symptoms to endorse.
He went to the clinic, and the NP gave him the stimulant he wanted. If she had bothered to read any of the literature, she would have known half (or more) of these drugs are diverted on such high pressure campuses.
Apparently it wasn't enough. Within a few months, she gave him 2 more stimulating antidepressant drugs.
Of course, all the details were not released, but as an experienced NP, I would never have prescribed the first drug, let alone 2 more.
It was said she wasn't properly supervised by the MD , but nothing was proven. She still has her license.
I just think it is very, very sad.
Come to think of it, my brick and mortar school 20 years ago required some RN experience, but nothing Psych specific.
However, my cohorts generally had extensive experience, as I recall.
I worked inpatient for many years, and an RN there who was widely considered to be just barely functional got his Psych NP degree.
The last I knew, one of the physicians rolled his eyes and told me the guy has a good job in a nearby city.
The doctor said "don't worry, all he does is renew scripts for a real psychiatrist".
That is not all he does, I can assure you.