Yes, exactly. Not as a ‘crutch’, but more like training wheels. Thus, better drawing could maybe result faster from using the program, than with pen/paper…?
(sacrilege!)
SBP ‘knows’ what a line should look like, and provides a way to make an artistic gesture in the linework, that is possibly better than what the beginning artist could do alone. The artist ‘wants’ to make the correct/beautiful line, and SBP helps them succeed. This positive feedback loop is amplified with the guides and symmetry tools. The end result, when the tools are taken away, is that the artist is now ‘better’ rather than ‘worse’. A crutch leads to atrophy…but training wheels lead to a new wonderful experience.