I don't think this one applies to the trope of "society says tall girls can't be cute", this one is about how the tall girl can't play the follower role that she likes because of her height, and that makes a lot of sense in things like dance where the male has to be taller(or same height) than the female, deviating from that will likely make them lose points in competitions and the like, so she plays the male role while she'd prefer to play the female role, it's not like they can't do it but if they do they probably won't get too far in the dancing world.