Before I begin, I must say that I am not great at drawing, though I did spent a few years trying to get good at it in my teenage years. My experience with art really comes from music.
Having said that, artists can, and routinely do, make great art out of crap material. Found object art is basically this, not to mention collage.
High end material is a tool, a really expensive screwdriver won’t turn a screw tighter but it should last longer, and good paint and brushes should serve to make the task easier, not more creative.
I guess the only thing I question is that this needed proving.
