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.
Prestige and desire, likely.
You would probably also see the state require some labor from people in order for society to function; I imagine that certain classes of skilled and or dangerous labor would get them from having to contribute to some manual tasks.