One thing you notice as a trans person is how many of us seem to be either neurodivergent, or have a chronic illness or disability (or some combination of all three). To me, it's obvious where the correlation lies: We're all already used to navigating a world that wasn't built for us. We already don't fit cleanly into the boxes society provides us. We already don't conform to society's expectations, so that makes it easier for us to admit and accept our own gender non-conformance.