Very well put. Many people are very blind for this, they forget that everything they can do they at some time had to learn as well. And not everyone learns everything at the same time.

Anecdotally, something I can actually confirm from personal experience with math. As long as I could remember, I had trouble with a lot of it.

Then during the last years of high school I had an excellent teacher and a lot of concepts actually did start to click on some level. Frustratingly, I still had a lot of trouble. While I understood the abstract concepts much better.

In order to solve issues, I still had to apply a lot of concepts I was supposed to have learned in all the years previously.