Yes. I think another part of the problem is that there were changes in the mental health laws in the 1990s that made it much more difficult to send people to psychiatric hospitals. I've been noticing that a lot of people who probably qualified for “not criminally responsible” are ending up in the prison system because of that.
Lawyers don't pursue that avenue, or the offenders don't pursue that avenue for themselves because it's more difficult, and they can probably get out of prison quicker than they can out of the psychiatric hospitals.