About it being called ‘Drawing:
It should be called “Drawing and Erasing.” It is just as difficult to erase as it is to draw. In many cases, I’ve seen it considerably more difficult for an Artist to erase something as compared to keeping it. Most tend to hold onto parts of their drawings that make it difficult for them to learn new elements of drawing. They protect what they think is good, while what they think is bad rarely makes it to the surface.
The ability of the person to get themselves out of their own way is of up-most importance.