Under capitalism, a lot of the time, highly dangerous jobs are also highly paid. Kind of a balance that the individual decides to engage with. Same idea behind getting an advanced degree in STEM or law. I think of my job by example, I’m a power plant operator at a large combined cycle plant. No fucking shot I’d be doing this if the pay wasn’t good. I’m around explosive and deadly hot shit all day.
For advanced STEM degrees, there are people who just enjoy learning that sort of thing and applying their knowledge.
In the same vein, some folks are just attracted to dangerous and difficult jobs because they get a sense of purpose or identity from it.
Others it’s community. I knew a guy who did 20 years active duty military, then joined the national guard, then took a job for the same national guard unit as a DoD civilian and stayed on until they forced him to retire. They had practically drag the guy out. He never did anything but bitch and complain about the work he spent more than 40 years doing, he sounded like kinda hated his job, but he liked being a part of the military.