I think they usually do not attempt diagnosis before people are around 21. Maybe has to do with prefrontal lobe development. The reason is that kids are just stupid and do things that might be considered antisocial but are just growing up. Since there is a great stigma attached to those personality disorders, even in the mental health industry, they typically don't want to risk the mistake of incorrectly diagnosing it.

Some psychopaths are highly functional and seem to be useful at times. I'd rather have a psychopath trauma surgeon for example. But I do think they will make the planet uninhabitable with all the wars and data centers. I've toyed with the idea of eliminating the genetic component through DNA tech, but then it opens Pandora's box for eliminating depression and all other sorts of things that can be natural adaptations or responses to environments, so the next thing you know we would just have perfect people without the imperfections that make us human.

It's a fascinating topic. After being the target of a malignant psychopath I read some books (after I moved away). I found myself wondering which one of us was really flawed. Is it us for having empathy and vulnerability, or them for the damage they do? After deciding that they are creating barricades for climate change efforts (oil companies repressing clean energy tech, Trump killing wind farm efforts, bombing things constantly), I have come to the conclusion that they will contribute so much to the destruction of our species that it must be them that is flawed. We'll say rather, the condition is flawed since you're right about recognizing individuals as people and not their mental diagnoses.