I agree with you there, I think there is a tendency to romanticize the life of a blue collar worker, and thing of them as the noble simple idealized "proletariat", when as you point out the stereotypes are stereotypes for a reason.
But I have to wonder is part of that because of the brain drain in the trades that resulted from everyone going to college and feeling they had to do white collar work. Before a smart, observant, hardworking young man could become an electrician and by virtue of being observant and quick witted could succeeded and excel and become an outstanding electrician that could bring about innovation and elevate his work team. Nowadays though the same hardworking intelligent young man is being told that the trades are for stupid people, and he is too smart for that and wouldn't it be much better to go get a college degree so he can get a "real job". Then twenty years and $50,000 of student debt later he finds himself as a project manager trapped in a standup meeting at 8:00 on a Wednesday morning, hating his life, drowning in unfulfilled despair and wondering what went wrong with his life.
I just think that part of the stereotypes about the trades has become a self fulfilling prophecy.