Not to suggest that the latter is wrong, just interested in your actual goal. In teaching myself to draw (anime art specifically), I'm aiming to reach a professional level, but am not interested in becoming a professional artist. The only factor I've felt would limit my ability to achieve this is time commitment (since research is pretty time consuming already). I'm not interested in committing as fully to it as someone who makes their living off art, so I don't expect to match them in all ways. So, for instance, while I expect to eventually be able to match in terms of overall result, I expect to not be anywhere near as fast as a professional can be.

Creativity/inspiration seems to be missing culturally. Consider for example Maths or Physics, where creativity is essential to internalize the material, but the teachings usually emphasize memorizing a few tricks to solve well-known problems and pass the year.

But even if it could be trained, there's 1) the luck factor 2) inborn quality variations. Some people just have it in their bones more than others, even if it manifests "just" as being more relentless in practicing.

That's to say, I mostly agree with you, but I'm curious as to how far we could reach with different teaching approaches.