merrymouse
In general I also don't think there is a lot of reason to switch male and female roles outside of special circumstances like schools or historical or experimental productions. I'm not worried about balance so much simply because I think it is so rarely convincing that it would not have any real effect.
Impersonations are a little different, be they of real or fictional characters, they aren't meant to be realistic and often are exaggerated as well, like a political cartoon. When its done well it can be really insightful, and when its not it tends to seem lame or mean. I always think the bar is whether they are saying something true - not nuanced, necessarily, but true. I posted far back on the thread a male impersonator whose character is a very stereotyped unregenerate male, but of course the point isn't to say that is what all or most men are like, it's to skewer certain ideas about men and women in our culture, and also I think we are sometimes meant to reflect on our own failings in that as well and that is a valid thing for comedy to ask of us but it's not very compatible with an offence focused culture . In other cases the impersonation is only opposite sex by chance, it's really about something else like a political view.
Drag is again a different kettle of fish. I absolutely think it can veer into denigrating women and being mean rather than insightful and I also think a lot of it is very poorly done, people think they can get dressed up and suddenly they are funny. And further as it's come to be seen as a kind of identity beyond being a specialised sort of theatre, it becomes questionable.
I'm not sure those things are intrinsic to it. I think there is a real exploration in gay culture about masculinity and femininity. Personally I think masculinity and femininity are not simply products of culture, but they are certainly really experienced in any case, and I think there can be for many gay men, and lesbians as well, a sense of having a significant relationship to both or wanting to somehow integrate them together. I see drag as coming out of that really, its a very male expression of femininity. Kind of like those jokes about "what would the world be like if men breastfed" it's "what would the world be like if women were men".
I don't think I would really expect women to be all that interested in or to "get" drag, because its sort of by men, for men, really. There are things that are similar for women and that's ok. What's a bit weird is that its become such a big thing.