I’m not sure the edge case of school clothing follows the same principle. The reason sending girls home for their clothes is unreasonable is because the expectations are lopsided: boys can wear clothes that are equally ‘inappropriate’ without being sent home. In other words, girls who are sent home from school are already wearing appropriate clothes, and they’re being asked to dress in the proverbial paper sack. The girls who are sent home from school are (hopefully) not attempting to court the sexual interest and favor of peer boys as a power move.