100% of all the actual engineering I did commercially didn't need me to go to university to obtain. At least 50% I got on an apprenticeship course BUT the one thing that it did give me was to teach HOW to think about problems and HOW to use tools to solve problems that had never been solved before.
If you want to build a house, you don't do complex calculations on material prosperities and extensive calculus: you look it all up in a table of building practices.
And that's the difference between a technical and an academic education. A technical education teaches you the wisdom of those who have been before: An academic education teaches you how to add to that knowledge yourself.
That is why you need probably only 5% of people to actually have that sort of education.