This seems like something specific to the individual. Maybe this isn't the job for you, but there's probably enough people "made of different stuff" that could handle it? I feel like there's a subtext in this discussion that "nobody can handle it" or "you have to be a monster to work this job" but that's just not true.
Just out of college in the mid-90s, I worked for a few months at a small local software company in the last throws of death. As a last grasp at survival, all the programmers switched to doing cold call sales. With phones.
I would stare at mutilated children all day long rather than go back to cold calling. I was miserable and I hated every moment of every day until the company (happily, for me) closed up. Yet I know people who somehow think it's perfectly normal to dial random numbers and try to pitch them something. They're made of different stuff.
I've talked to people who make the same claim about computer programming. They'd rather starve.
Facebook has 10,000 moderators. I'm pretty sure there are at least 10k people in the world who are psychologically fit for content policing. It's doesn't have to be for everyone.