There are no jobs that require no training. There are no jobs that require no skills.
I worked as a dishwasher at a dorm kitchen when I was in college. Dishwashing is usually called an “unskilled” job, but someone had to train me to load the machine, how to run it, and what to do with the plates and things when they were clean, and I needed to learn how to do this efficiently so that the kitchen didn’t run out of plates during mealtimes. All of those things were skills I had to learn.
I worked on a sandwich line for a summer when I was in college. Food service is usually called an “unskilled” job, but someone had to train me how to make the sandwiches, how to prepare the salads, and how to prepare the desserts. I had to learn how to work with the folks in the prep kitchen, with the wait staff, and with the other people on my line. I had to be trained how to open and close, because sometimes I would get those shifts. I had to learn how to work quickly and efficiently so that our customers would get their meals in a timely manner, and so that everything was prepped and clean for the next shift. All of those things were skills I had to learn.
That whole “special skills” thing? It’s classist and probably racist.
Unskilled jobs are poorly paid because the employers can get away with it, and that’s pretty much the whole reason. They are permitted by our capitalist society to exploit workers, especially those workers who are most disadvantaged.
“Unskilled” workers make our food, take care of our kids and our elders, stock our grocery store shelves, clean the spaces we use, and do hundreds of other things that make our lives easier. “Unskilled” jobs require a fuckton of physical labor. Don’t those things merit good compensation?
Every job requires skills, every job requires training. And every job should be respected and have dignity, and should pay people enough to live on, and then some.