Big miss in your assumptions...the huge potential growth of salary or wages over time for college graduates.
If you go to a trade school to be an auto mechanic and go work at a car dealer, your growth in pay is more limited. You're not likely to have any realistic expectations of moving up to more pay in management or
leading the business.
And that's not a dig on trade schools, due to the huge loss in workers resulting from those aging out of the workforce not being replaced by births or immigrants, all job training needs help and support
And that's the trend...support for them is not nearly as unique as you claimed in another post.
Just in our area I know of programs for mechanics, line workers and butchers. I know of many places that hire them do their own training too.
Have a son in law with a gov. Job where they are training him to be a county inspector who handles septic and building inspections, wetland delineations and compliance with env. regulations, etc. He started but didn't finish college.
The one kid I have who didn't go to college was hired on potential and trained in house too.
Business and local leaders and schools aren't sitting back and wringing hands at the looming shortage of employees, they are starting to address it.
They can't overcome the stark numbers though, the solutions for that...MORE immigration, $$ and support encouragement to have children, and more... are fodder for another discussion.