Fair. I should've thought of designers and photographers. Ballet makes sense, since there are trials for prestigious orchestras and the like, but that isn't something I knew about.

When I wrote my comment, I was thinking of the medical profession, dentistry, auto & other mechanics, appliance and other device repair, construction ("there's a pile of lumber in the back, you have an hour to build a shed and then we'll consider hiring you"), plumbing, civil engineering ...