Just my thoughts on that: I find that "masters" of their art often underestimate their "unconscious competence" and tend to think (and suggest to newcomers) that beeing more "loose" and relaxed and expressive etc is the key to an good and expressive image instead of practicing or mastering basic skills. But they overlook that all their practicing and experience shows in every line and brushstroke, colour, composition without beeing aware of it. If someone has internalized perspective, she even deliberately cannot make the small beginner's deviations that make a drawing look like a school child's work. The deviations she makes when beeing "loose" make it art.

So what is the solution for learners like me? Look for the easier tasks that can be mastered with less practice (urban sketching for a while before water coloring?) Find joy in practicing (doodeling meditation, decorative painting). Narrow your field (not trying to paint a landscape today and a portrait tomorrow, and friday buy that new oil painting kit). Find the right teachers (like Oliver) who recognize the importance of practice.