I don't think it matters why people learn to knit. If they enjoy it for some reason, it's probably not hurting anyone else for them to do it.
Fear the Sock Monster! RAWR!
The individual has always had to struggle to keep from being overwhelmed by the tribe. If you try it, you will be lonely often, and sometimes frightened. But no price is too high to pay for the privilege of owning yourself. ~Friedrich Nietzsche Double Pointed - a knitting blog
I also notice a lot of home-type catalogs (like Crate & Barrel) have pictures of baskets filled with beautiful yarn. I love that knitting is so popular right now! It just means that I can find everything I need SO easily!! And I love that so many people are excited to learn. I am starting a knitting circle in January and even invited people that don't knit. They have already RSVP'd to come!
and my little shadow, Willow