My father did not want me in a "blue collar" job
I don't believe it was the job so much but the "culture". Dad wanted us to go to college because he was a college graduate himself, he was a dentist with the Veterans Administration who was a 1952 Georgetown Dental School graduate. So he had a lot of education. It was believed back then that college made you a "better person", that is, you would study literature and learn about history and you would be a kinder person who was good with people and have good conversations. You would not be part of the culture of for example, steelmaking/coal mining that was get off work, go to the bar, get drunk, go bowling, play the lottery, cuss and swear all the time, get the wife pregnant and just go and do it all again.
Unfortunately, I think by the time any of us came along that "college myth" was gone, because unfortunately, some of the worst people I have known are educated. When I transferred to a 4 year college it was one of the worst parts of my life, with mean people, mean faculty, bad food, boring weekends and having to learn all alone. Another school might have been better, but I was not there long.
Anyway, when I would tell dad I might want to work for Sears as a repairman (back when it was possible) I would be told I was throwing away and opportunity. Of course, back then, college was much less money than it was today. Also, I was "too nice" a person to be in that "awful' culture.
Meanwhile, I have found many college educated people to be complete assholes, so much for the "better person" myth. When growing up in our neighborhood, a number of engineers lived there. All of them were surly, bitter, men who yelled at their kids, cusssed and swore, were rude ushers in the church, were abrupt (never said a complete sentence), and had large families because they were getting the wife pregnant all the time. I had no idea what an engineer even was. Later, I worked as a maintenance person at a JCPenney store. JCPenney requires all manager candidates have a college degree (why? It's not like you have to have chemistry to know about clothes). All these managers did was hang around the store manager and tell him how wonderful he was (actually, he was quite obnoxious). Meanwhile, none of them could even figure out how to put clothes on hangers!
How much do you think this "culture" factor has to do with why some jobs are hard to fill?