Lifting human bodies is hard, especially when they’re obese (which many, many older US citizens are morbidly obese).
The people who do these jobs are underpaid and often expected to do the work of lifting large, obese bodies (300+lbs.) without the proper heavy lifting equipment.
The number of people who do these jobs who end up with long-term serious bodily harm like their backs being absolutely fucked up and needing surgery is too damn high.