> Roofing is an incredibly simple job to learn for instance, and it pays little better than minimum wage.
I can't speak to your area, but doing roofing on tall houses/buildings with a steep slope here pays much better than working on relatively flat roofs or one-story houses.
Skill does tend to get some reward; I think I'd be inclined to go electrician if I had to. I think if one wanted to get paid the most, I'd look at plumbing because it both takes some skill (despite the "3 rules" joke) and is literally shitty. Personally I enjoy a bit of carpentry work now and again, but my skill is nothing compared to my brother, and he was never really able to put together a comfortable living despite his ability. Fortunately, he was able to get an engineering job (not the software kind) fairly recently and was amazed at the idea of getting paid for a day off once in awhile and having health insurance.
If you didn't win the birth lottery that allows you to open door #1, you're stuck with the second option. Moving furniture or going up on a ladder aren't terrible when you're fresh out of high school. They are when you're 50, and you're going to be one of those that takes Social Security at 62, possibly after multiple spells of unemployment as you approached retirement.