Has anyone yet brought up the fact that remodeling existing tissue is not driven by just one, or two, or even dozens of chemicals? We have over 200 hormones.
Biology has a huge mix of overlapping ways to do things, either how things are built and stay, or things that can change a little in how they work, or in some cases actual metamorphosis. Sadly, autists aren't butterflies.
While major sex hormones can signal hair and glands to do shit, the glands themselves, the bone structure itself, tons of other structures and organs, they don't change that much in what they do, and they don't remodel themselves. We aren't fish or butterflies. The body you're with can change but not like that.
Men still have vastly more muscle, cardio performance, denser, stronger bones, and better insertions. Hormones will never widen hips or otherwise make structural, "mechanical" changes. Women walk like they do because the angles of their joints are different. Bones won't start shrinking or growing from hormonal fuckups.
Brains won't remodel. They can change a little, but not entirely. The structural differences of male and female brains don't go away even if chemicals change the few things they can change.
It's an incomplete hack job, nothing more.