>>4464851"Just draw" does help with procrastination, you're making yourself do something productive. "Just draw" does mean you'll improve if you're applying yourself and striving for improvement, which you should be.
Your last point is the only semi-correct one, marketing is indeed a whole other skillset. However, how are artist suppose to network and search for money opportunities with no or weak portfolios? The first step to artist marketing is still... "just draw". Make a strong portfolio. After that you can worry about marketting/business.