What does 'undeprived' mean?
Wealth, affluence, privilege - or the lack thereof has - has never been a telling factor of whether someone is going to turn into a psychopathic killer.
While the CT shooter, and others like him, didn't have wealth and riches what they DID have was a galling lack of empathy, compassion, and self-control. Forcing kids to do a few hours of community service isn't going to fix this problem either.
While I agree the lack of knowledge the media has about mental illness is pretty shocking, it only helps to underscore the real issue here that, in general, we ignore the issue of mental health. We complain about our medical plans and medical insurance costs yet we continue to ignore our mental health industry which is woefully lacking when it comes to dealing with folks who are no longer children, so they can't be forced into treatment by their parents. They can refuse treatment entirely unless they present a clear and obvious danger to the public or themselves. Even then many places will still refuse to forcibly commit someone for fear of being sued. Of course by the time someone becomes an obvious threat to the public, it's too late for treatment as more often than not, the police get involved and usually end up having to shoot the person out of self defense.
It's not guns that are the primary issue here. It's that our mental health system is failing to help thousands, even millions, of people who are visibly functional yet mentally troubled.