Men's Group

Think of it this way. Every occupation requires the following things, in some proportion;
a) physical exertion
b) time away from preferred activities
c) dexterity and manual skill
d) ethical compromises
e) knowledge (education)
f) natural aptitude or talent (social aptitude and appearance would fall into this category)
g) risk
h) discomfort

There are probably other dimensions, but that's enough for a start.

The jobs that require none of the above are done by volunteers. Petting puppies is rewarding enough that they don't need to pay people to do it.

Surgeons experience all of the above so the competition for their jobs is minimal, (partly because the AMA controls the number of people allowed to acquire the knowledge) so they are paid a lot.

Coal miners need to accept a lot of a), g) and h) and they're disabled frequently enough that the supply of labor is finite so they're paid more than minimum wage. Crab fishermen also get a healthy dose of b) and c) so they're paid quite a lot more than minimum wage.

Prostitution requires pretty much all of the above except e) and perhaps b) so there is little competition and they're paid pretty well.

Receptionist at an art gallery? Reading to kids? "Social Media Manager"? Doesn't require much of any of the above, so there's lots of competition, but the lower boundary of wages doesn't allow the wage to go low enough to find a low bidder, so employers use arbitrary criteria to pick someone. Looks perhaps... or arbitrary levels of useless education - such as art history.

But yeah... a limitless supply of unskilled labor has depressed wages (in 1988 when this article was written, there were about 3 million illegal immigrants in the US. Now there are 12 million).