Giving some GC love to the movie Babe (1995) and the children's book it was based off, The Sheep-Pig (1983).
See, Babe is a pig who gets adopted by a sheepdog and wants to do what sheepdogs do. But Babe is not a dog. When Babe tries to herd sheep the way that a dog does, he fails, because he's small and doesn't have sharp teeth to frighten the sheep into listening to him. The other farm animals tell Babe to give up because he is a pig, and pigs aren't meant to herd sheep.
But Babe still wants to herd sheep, so he discovers his own way of herding by asking the sheep politely. And the sheep listen to Babe because he is small and polite and doesn't have sharp teeth.
You see, Babe is a pig who wants to be a sheepdog and do the things that a sheepdog does, but no one ever calls him a dog. Because Babe is obviously not a dog. Babe is a pig, and therefore, when he's successful at sheep-herding, he becomes a sheep-pig.
Babe doesn't feel any lesser by being a sheep-pig instead of a sheep-dog. Babe is still constrained by his biological reality of being a pig. During the movie, he learns and has to live with the knowledge that he--and his lost mother and siblings--were bought and sold to be eaten. If Babe pretended he was dog, that reality would not change. In fact, if Babe had doubled down on trying to herd sheep like a dog, he would have failed and eventually been eaten, because Babe doesn't have the biological traits that a dog does.
A similar story arc happens with Ferdinand the Duck. Ferdinand knows he is a duck, but wants to be a rooster who crows and wakes the farmer up, so that the farmer will find him useful and not eat him. But Ferdinand is not a rooster, and his fake crowing only annoys the farmer and his wife. After a fellow duck is killed for Christmas dinner, Ferdinand realizes he can never be a rooster and leaves the farm instead.
Moral of the Story: you can't change what you biologically are, but you can change the role that society prescribes to you by embracing your natural traits in unique ways.