I think - speaking generally - educational institutions
facilitate people to learn / apply problem solving, but don't explicitly teach it or test for it.
This was my experience: we were taught just the core basics. We essentially learned how to read and write in our field, so that we could at least understand and communicate in that world. The material and expected outcomes were very much "here are the standard building blocks: how well do you
know it?".
In the final year, a little more time was spent discussing what you could
do with those blocks, what the tradeoffs were depending on the application, and the success criteria shifted more towards "there are a thousand ways to solve this problem and they all work: how much
better is what you've come up with, and how novel is it?". Still, you could get by without really trying to be all that inventive.
I really think with school, you get what you put into it. There's a lot of stuff that
can get you thinking, a lot of knowledge that you
might not've otherwise had access to, and lots of industry opportunities that you may not have even known existed.
Obviously for someone like yourself, you really didn't need school to get where you wanted to go. The vast majority of people I think are not as fortunate
.