Yeah, some people are just born fucked up, and putting them in prison to handle it is a bad way to handle them. What do I mean? Well, when people are born fucked up, it's usually pretty obvious. A lot of the infamous mass shooters that come to mind, people knew. In some cases, they tried desperately to get somebody to help do something about it.

But our system (correctly, IMO) operates on the principle of innocent until proven guilty. That is, we have to wait for fucked up people to hurt somebody else before we can put them in prison. Better would be a system that addresses mental health concerns and anti-social personality issues that people around them could draw upon, rather than just relying on cops and courts.

Don't get me wrong, I don't think that we could ever completely eliminate incarceration. We don't live in a perfect world, after all. But getting rid of prisons is a good goal to aim for.