I think you and others here bring up a good point for debate. The question is if they are in fact "glorifying it". As a PP brings up, is Haunted Mansion glorifying women who kill their husbands? Is it glorifying witchcraft with the seance scene? If one really wants to go for social/historical accuracy, in real life princesses came from nobility/royalty which survived on the backs of serfs who were allowed to work the land of the nobles and not treated well at all. Think guillotines in France on Louis the XVI and Marie Antoinette when the commoners finally took power.
You are of course free to interpret as you choose, but I would suggest "glorifying" is not the proper word or idea here. I would say that Disney is definitely
romanticizing certain elements which have a historical basis in reality. Which is often what storytellers do. They are not attempting in any way to make serious statements about history or social commentary. They are trying to entertain.