Of course performative femininity/masculinity are how trans people simplify things for cis people.
I know how hard it can be to explain the contents and nature of your less typical head to those whose brains don't share the condition.
Simplification is both useful and helpful. But if the simplification is so inaccurate and far removed from the reality that everybody has got the wrong end of the stick and things are getting heated, it needs to be dumped with something more "truthy" replacing it.
Especially when so many, and increasingly younger, people appear to have swallowed the simplification whole and made it their "need to transition" reality.
The upshot is, if performative m/f is required to explain and discuss, (even between transpeople who are talking amoung themselves, in public view) then perhaps performative m/f has something to do with it.