When I grab the guitar, it’s all chaos and improvisation. Nothing like drawing.
I’m actually better at playing guitar than at drawing but my playing has no structure. I don’t seem to get music on a structural level.
Meanwhile, it’s pretty obvious when I draw. Every time I draw, I make a series of quick decisions: What style to go for, what colors to paint a mood with, what materials to use, how big that piece should be.
I can do the same thing with music. And I think pro musicians do that.
Structure gives you a direction to follow.
And the structure of my music is my choice.