Regardless of skill level, the very act of drawing something that is within your field of vision is healthy for your brain. Simply trying to represent something realistically on paper forces us to actually look at it (the object or scene being drawn) with a more sensitive and critical eye. The brain is instantly more engaged when looking at something while drawing it, than when just casually observing that same object. New neural networks are created in the grey matter, and our knowledge of, and relationship to that thing is deepened. In this way, drawing builds an intimate knowledge of that which is being drawn.