Maybe that angle became the norm because the working class jobs were turned to shit over time via union busting among other things. I don’t think nearly as many would be thinking about university if many if not most working class jobs weren’t seen as precarious. Heck even a ton of white collar jobs that require university degrees are precarious now. This is not to detract from your point that we need to improve the conditions of these jobs, just to put the blame where I think it belongs and therefore where the solutions lie.