Why would people play a game with a misunderstanding as to the "meta"? I mean, that would be pretty weird at a poker game or a chess tournament or whatever.
Kind of tangential, but...
It feels like it happens a lot with people trying to play EDH/Commander MtG at game stores - granted many probably leave after a hand or two if they get curb-stomped or do the curb-stomping due to the power level the decks were aiming at (not necessarily anything to do with player skill or $$ spent). Showing up at a chess club where everyone else is vastly higher or lower rated probably isn't fun for long - and some serious bridge players seem not to be fans of the not quite as serious play groups but might try to stick it out if there aren't other players around.