a) off topic, and (b) representative of a global trend that was going on at the time, led by the psychiatric profession, rather than being any kind of personal whim of who your president happened to be at the time. We in Australia closed our mental asylums at the same time, with the same effect.
Blame Jack Nicholson if you want to blame someone; or rather the rash of 1970s “aren’t asylums terrible?” asylum fiction.