It’s because they have too much power. Gets to their head. Same with politicians, though they usually don’t go round shooting people.
You forgot sex workers, which is actually the most dangerous job.
Violence and diseases. In consequence many sex workers get hurt regularly during their job, some get killed and many have PTSD and/or abuse drugs and alcohol.
In countries were sex work is legal this does not get significantly better, btw. I live in Germany where sex work is legal since 1950 or something and it’s a job you even have to pay tax for. They still suffer from violence. There was a protest this year to give better protection from violence.
Although cops are becoming more and more power drunk it doesn’t mean their job isn’t dangerous, especially in countries* where every nutcase can get a semi-auto easily.
*USA, war torn countries , Latin America.
Okay, but imagine a job at which you have to ring the doorbell of these people every few minutes
I thought the most dangerous one was president, at an 18% fatality rate (8 out of 45 so far)