I've read this research before as well. The real question is whether these people get to these positions because of their psychosis or whether by getting to these positions, their psychosis is encouraged to manifest.
Personally I believe that there is a lot of nature in psychopathy. Scans tell a consistent story of associated brain damage in the profound cases. Sometimes born with it, a few from selective brain trauma.
It is a sliding scale I believe and I'm sure a mix of high function in some areas and low in others creating a socially functioning but wonky average. I have seen fairly bad guys seek out mentors to make them worse (the dark side)

, perhaps some are drawn to psychopath dominated professions not just by greed for money.
I don't think there is any accident the Donald was mentored by Roy Cohn. Whatever DT is, it is a rare mix of high and low function combined with hereditary money & genes.
I have encountered a few unmasked 'pure' psychopaths. They are incredibly dangerous when you get in their way and you can't just kill them.
Hare who created the Hare psychopathy checklist believed that while we have 1% (ish) of fairly pure psychopaths there are 6-8% (no exact figure) of partial/sub-clinical/compensated/sub-criminal whatever who have limited or variable conscience. The term sociopath could probably be just said to be a semi-psychopath.
Combinations of hormones, poorly functioning brain areas and of course social conditioning (being made nasty by a workplace) of course affect us.
Psychopathy served an evolutionary purpose or it would have been selected out. Sometimes more rarely it is the result of brain trauma. I dunno, through the military I was exposed to the idea of wolves and wolfhounds or "altruistic punishers". Heroes and villains, with increasing resolution brain scanners it seems a lot more like typical and malformed with a good or bad upbringing.