I know quite a few people who do "dirty jobs." Both of my youngest kids did landscaping on crews where everyone else was Hispanic when we lived in SC for 11 months. It paid better than fast food, and was a better environment. And one did landscaping while going to school last summer in Dallas.
Youngest worked two years at an orchard and vineyard when first in college. First year, the rest of the crew was here from Mexico on a visa. At the end of that season, the owner told her if she could get a crew of more college kids, he's pay them the extra in hourly wages what it cost him to bring in aliens. She did it. Even before the raise it was paying better than retail and fast food. The other college kids were surprised they could get the work.
I used to know a teacher that got so fed up with dealing with that nuttiness, she went to work for a guy that emptied and serviced septic tanks. Said it matched her attitude at the time. After a year she and a neighbor lady bought the fella out and have been doing well since. Making more than she did as a teacher.
Most people out here have worked beet farms, potato farms, hay farms, hog farms, built fence, whatever. Most everyone I know has trapped or snared coyote and bobcat for the money. Stinky, exhausting work. Heck I clean rentals in the winter for landlords who are older just because it's good exercise and extra cash. Sometimes it requires a scoop shovel to start. And my day job is... well, would be considered pretty good by most.
So, there may be a prejudice against manual labor, but it can be overcome.
