I’ve gotten beyond my confusion by recognizing these are just “art shows,” not really fashion shows. The artist is paid for a mobile creation carried by models of some kind, there’s no real intent to sell clothing here EDIT: I should say there is intent to generate brand interest and sell other clothes, perhaps, but these shows themselves are not what’s being sold.
Because yeah, I find most of this sort of thing not really my cup of tea. But for folks who do, more power to them.