There is no widespread threat to kids from SSRIs, antipsychotics, and weight loss drugs. Some kids are on them. Most of those kids need them.
You know what happens when you arbitrarily ban use of antipsychotics in minors? Minors with psychosis get tied down and given massive doses of sedatives. They get hurt. They get killed.
I treat minors with psychosis in the ER. Kids who need these drugs really need them, and the alternative is inhumane and cruel.