This whole idea that your subjective identity can’t be legitimate unless you’re somehow able to back it up with objective evidence is a pretty awful situation to be put in, especially when you’re inflicting it on yourself, given how any “proof” of being trans is entirely dependent on subjective experience. What proves that you’re trans is only to understand yourself as trans. When dealing with gatekeepers and family and the numerous external forces that would deny us our identities, it’s not such a crippling situation, because at least we know, and we are the proof, and beyond that it’s simply a matter of figuring out what they think would count as “proof” and what exactly they need to see or hear to believe you (if anything). But when imposing this situation on yourself, when the only possible actual certainty is in accepting and understanding yourself as trans, but you refuse to accept and understand yourself as such until you have that certainty… you’ve created an impossible situation for yourself.
That last part I highlighted is very interesting.