I was told not to major in "underwater basketweaving" in 1983, or otherwise I'd be garbage man--as if that were not one of the most important jobs in a society! It's been the same class-warfare BS for coming up on half a century: demean low paying jobs at all costs for reasons I still don't understand.
A lot of the demeaning came from the low wage workers themselves. Both my grandparents were blue collar. One painted houses, one was an elevator mechanic. They essentially forbade their children from going into the trades. "Learn to make a living with your brain, not your back" was what my dad heard constantly from his father while growing up. And so my father went to college and became an engineer.
In 1983, finishing high school in NYC, we were told to consider being garbage men because the starting pay was higher than most college graduates got!