Do you remember when Apple stopped making the Mac Pro in Austin because we couldn't manufacture enough screws? [0]
Everyone gave up post '08. The attrition of blue collar work overseas has been painful, so the recommendation writ large has been to avoid going into blue collar work. Even now if a worker takes on a $20 an hour job, they have no guarantee their manufacturing job won't be shipped overseas again. So why choose that career path for even $25 or $30 an hour? It's risky. The energy sector has this problem more severely than any other in part because everyone keeps talking about phasing out fossil fuels. How much would I have to pay you to take a job that a quarter of the country wants removed?
No one wants a blue collar job anymore either. That was the whole point of going to college: you become educated for the right to sit on your ass for eight hours and act like you're doing something worthwhile.
And now you can do that from home.
Compare that to working a skilled manufacturing job where your every movement is measured in a country.
[0]: https://www.nytimes.com/2019/01/28/technology/iphones-apple-...