Honest question: of course, everybody would prefer to work with "lovely" stuff, but I really have difficulties getting what people find so much difficult/hard about jobs where you encounter such content on a screen (the same holds for moderation jobs).
I would claim that I have seen the internet, and I guess many people of my generation have, too (just to be insanely clear: of course not the kind stuff that is hardcore criminal in basically all jurisdictions worldwide - I don't want to get more explicit here).
I wouldn't say I am blunted, but I do think I could handle this stuff without any serious problems as part of my job. I'd thus rather compare it in terms of emotional comfort with a toilet cleaner who sometimes also has to clean very filthy toilets - which is just an ordinary job that some people in society have to do.