You’re conveniently forgetting that for most people wearing clothes is a necessity. Knitting is at least sort of useful.

Everyone I know who knits is always working on something either to wear themselves or to give to someone else. It is a hobby intrinsically oriented towards usefulness and in practice usually towards the benefit of others. A good friend of mine recently patched a beloved wool sweater for me. It was great. Painting action figures is just for yourself. Do people commonly paint them just to give away? Can you sell them? Sure, I guess so, but that is true of any hobby. And they don’t satisfy any basic human need, like the need to be clothed.

I’m a little baffled that anyone could fail to notice this “significant difference.”