But what if I'm faking it to get attention, even though that is really unlike me and I don't seek attention? What if that's my subconscious trying to be more important then it is? That's where it gets spoopy
IMO It is not possible to fake gender identity, for that there would need to be provisions to selectively invalidate people for how they claim to identify. This is not compatible with the idea that the way people identify as being valid, because it introduces scenarios where you can override this and say they aren't valid.
On the opposite side of the spectrum this also means that it is disgustingly unethical to try and call people out as being "in-denial" or an "egg" for their violations against gender norms, that would be going against their stated identity and invalidating it.
If the idea that gender identity is valid and should be respected holds true these points of invalidation are just as wrong or hurtful as any form of invalidation, and such cannot be justified, a person isn't "pretending to be [gender]" nor are they an "egg", what they say is final until they say otherwise, and that is how it should be, because if people can be invalidated in these situation, they can be invalidated in others by making it seem like they are these situations. This already happens by people saying trans people are faking it, or by saying fem presenting transmascs and enbies are really girls in denial.