My DS grew up watching me sew clothing, crafts, etc., but I didn't start quilting until after he had gone away to college. However, I taught him how to use my machine for stitching and mending, and he did a decent job. When I got a new travel machine, I called and asked him if he wanted the old one (a Bernette), and he jumped on it. He calls me up once in a while to pick my brain on how to do something or other.
Your friend's son just needs to be educated on what goes into making a quilt. He doesn't know, so I suggest you either educate him or ignore him.