Obviously I can't say anything for sure as this is speculation, but I have heard at least one trans woman say that part of the motivation for facial feminization surgery was in being able to pass better and being accepted in society as a woman. So perhaps if society was more egalitarian in how men vs women are valued, less demanding that AMAB people fit their assigned gender role, and/or gender roles are abolished then we would see at least some portion of the "why transitioning will help" equation be reduced. Though I think there's reason to believe even if gender is abolished and there's no social pressure one way or the other at all we would still find AMAB people who are significantly more comfortable in a female presenting body and vice versa and in the middle too (and I'm lumping together any combination of hormones + top surgery + bottom surgery here, in whatever form they may take in the future). So a spectrum as you said.