@quad When I see something like that on a resume I make a point of asking about what they're enjoying. So far I've been unimpressed with the answers. (Trash taste is not disqualifying, but if they can't engage in that conversation after putting that on their resume I'm not going to hold out much hope for their ability to communicate with customers)
You can't really learn much, if anything, at school. It can be incredibly expensive or confusing to learn as a hobby. And self-taught people on the job can be better than most pros.
There's probably a fair number of other industries where that can apply too