What kind of response are you expecting? Or is this just a rant/vent? I don't agree with your statement entirely, many people would also want people with NPD, psychopathy or sociopathy to get support. The problem, however, is that it is really hard for most to give people with strong narcissistic or manipulative traits the support they need. Similarly, I also have compassion with pedophiles and wish them the support they need. But obviously I don't want them to be enabled (or even allowed) to follow their sexuality. Same goes for people with narcissistic and manipulative traits. I want them to get support but not be enabled or allowed to hurt or manipulate others.
Recently I stumbled upon this podcast called "The Bright Sessions" where they basically envision neurodivergent people and/or people with mental disorders as having superhuman powers. There also is a character that might fall into your description of people who are not treated with compassion. The podcast really explores what that means and how compassion can look like with a person like that.
ETA: and this comes from a person who has been traumatized over decades by various people with strong narcissistic traits.