Well, and as I said, a lot of time people don't understand the value of the advice. Their train of thought is, "I don't want to draw 'real-life', so how is burning time drawing that going to help me draw what I DO want to draw?"
Especially for hobbyists and newborn amateurs, who aren't in it for the money and don't care about drawing any other way than the ways that make them happy.
And that's fine, it's good even, to have a goal in terms of what you want to do. The trick is understanding that if you can master the difficult stuff you don't want to do, everything else snaps into place SO MUCH MORE EASILY. As I said, these aren't lessons in "how to draw", they're lessons in "how to solve drawing problems".
So for instance, if you have a mastery of basic composition and anatomy, you find it easier to break down things into simply shapes which you can easily draw in perspective. This provides a structural basis for the more polished drawing which you can then lay over the top with the framework in place to create a strong basis for the work. It doesn't matter if that polished result looks like Jim Lee or Joe Mad or Satoshi Yamamoto (Pokemon artist) or Leonardo (the painter, not the turtle)... though they may all have widely different structural frameworks to their drawings, they all have something under their work.
And that, more than anything, is what I suspect is lacking here. Drawing from life will help with that. So will buckling down and learning some of those "fundamentals of drawing" (and that means actually practicing them, not just reading about them in a book or being told about them in a video or classroom).