> to be able to flip gender more completely than our best biotech and just by conscious will

a constant hedonic self modification and individual reinvention is obviously no sign of extreme change but the opposite, banality and powerlessness. As Augusto de Noce used to point out about the sexual revolution of the 60s, the sexual dimension became an obsession precisely because all other revolutions had been rendered impossible by an atomized society. There was nothing radical at all in it.

It's no accident that the Culture puts so much emphasis, and in that it reads ironically enough like satire of modern consumer society, on choice only at a level of reshuffling your sexual organs or bodily characteristics. The minds in the culture are by no means just a sort of voting mechanism that summarize the attitudes of the population of the Culture. They control the culture which we even get to learn in the books in the series that delve into the minds as characters.

> only at a level of reshuffling your sexual organs or bodily characteristics

"Only"?

"You're not allowed to do what you want because I believe in this old book" sounds a lot more trite to me.