I know some refuse to do the jobs because they aren't being paid a livable wage and the working conditions are dogshit. Part of the reason that there's plenty of desperate, ununionized workers willing to do those job, some who don't pay taxes, follow the law etc. Immigrants, especially illegal immigrants are being used as a tool to sidestep law, union rules, having to pay proper wages etc.
If a job can't be done without paying a proper wage and giving proper working conditions, it doesn't deserve to be done imo.