The thing I won't do is roof work. Too scary.
And that's why you're still allowed to DIY it.
If schlepping packs of shingles onto a 150deg roof was as easy as pulling wire or laying pipe (heh) they'd have trade groups and lobbyists convincing the government to keep you from doing it yourself just like the lower altitude trades do.
I had a boss who was up on his roof installing an antenna when he slipped and fell off. It was a scene from a 1920s comedy -- his wife was looking out the window and saw her husband's falling body flash by.
Only it's not funny IRL. His liver was punctured, he lost his spleen, and his back was never right again.