In the four decades after World War II, manufacturing jobs paid more than other jobs for given skills. But that is much less true today. Increased international competition has forced American manufacturers to reduce costs. As a result, the pay premium for low-skilled workers in manufacturing is smaller than it once was.
I used to get people criticizing me for drawing so many women with gorgeous idealized bodies, but I pointed out that I draw a lot of men with muscular bodies, washboard abs, and enormous wangs, and they never got criticized. So those criticisms have stopped.