You’re missing the point here.
These outward markers of power and marginalisation are themselves signs of internalised tendencies. If someone is socialised and raised as a young noblewoman, they’re going to think very differently from someone who was raised and socialised to be a knight, even if they don’t want to be. By the time humans reach maturity (which is to say, by the time they reach the point where most of these stories start in earnest), they’ve ceased to be the genderless infant they were at birth, and have had the expectations and internal controls of a defined gender imprinted on them.
That isn’t to say that rebellion against their assignment isn’t possible, or even undesirable, but even if someone cross-dresses (or even fully transitions) and manages to “pass” successfully, the way they think is still going to be different due to the fact that for a good chunk of their life, they were taught to fulfil an entirely different gender role. For games which delve deep into internal expectations, mindsets, and internal dialogue this is an important point, and getting it wrong will feel wrong.