>>125536119The crossdressing in Mulan happens for an actual reason though: in order to distract the guards long enough to get close and knock them out, the soldiers would need to not look like soldiers. What are there a lot of in big cities? Prostitutes. What do most guardsmen like? Loose, cheap women. So it makes sense that they would dress like prostitutes in order to fool the guards.
SU does the opposite. Sadie's mom wants her to perform because she's deaf to the wants/needs of her daughter. Sadie doesn't want to, so Steven sings while in drag in her place. The problem with SU is that there was literally no need to have Steven be in drag. The episode could have easily ended with Sadie just telling her mom what she thinks, and then not performing. Unfortunately, the writers had a political stance to shoehorn in, and we got the episode we got.