Scarves and hats are useful, though. Knit sweaters can be very comfortable and look good, if done well.

Granted, I say that as a person who lives in a cold-half-the-year climate, but my point is that, just like coders, there's plenty of shitty knitters out there.

The key with any skill is to approach it as a student, ready to improve. If this is something you wanted to try, get ready to make a few rubbish tea towels before you refine your understanding.