Personally, I would have no interest in dealing with the horrible things people do to one another, on a regular basis, as part of my job. No thanks. Reading the news is bad enough, I wouldn't want to live it.
Risk factors: "employment as nightclub bouncer, professional male dancer, professional wrestler, or law enforcement officer"
Funny enough, casual criminals fit that picture quite well. That would explain why they are attracted to "the horrible things people do to one another, on a regular basis" - to a non-trivial extent, they share the character traits of the people who do these things in the first place.
> “The Ruderman Family Foundation, a philanthropic institution, also found that first responders die by suicide at a higher rate than people in the general population, according to an April 2018 report.”
https://www.huffpost.com/entry/for-third-straight-year-polic...
Most important is probably access to means and methods - easy access to guns.
if you group people by profession and gender, you can probably find 1000 things that are specific to that group. it's like saying that programmers/engineers have a higher probability of being good at math or being introverted vs the general population.