When I was a bit younger, I used to think stupid people were a problem.
I don't know how I'd define stupid exactly, but you know roughly what I mean. I thought, "Stupid people cause problems."
Now I'm starting to change my mind.
However you define "stupid," I don't think it's stupid people causing problems. There's lots of things I'm unskilled, uneducated, or unsophisticated about, but I tend to know I'm unskilled, uneducated, and unsophisticated about it. If I got into a metalworking shop, I'd quickly ask someone there what I'm supposed to do to stay safe, and then I'd stay the hell out of the way.
You see, I'm stupid about metalworking and metalworking safety, but that's okay. I'm rarely in a metalworking shop, I'd ask for guidance/instructions if I was, and I'd be careful and stay out of the way.