Let's put it another way. If you're a trans-girl with a bulge, that's your gender. That's part of your identity

You're a trans-girl - a subcategory of girl, and from there a sub-category of trans girl. Gender is a nebulous concept, there is no perfect form of any gender

You can't line up a bunch of girls against a wall and arrange them by how much of a girl they are

Our brains are wired to categorize to take short cuts - but people don't fit nearly in boxes

Getting less philosophical, for some people that might be a huge trigger, for others it's just a trait. And if it's just a trait...well people like being desirable, and people don't generally appreciate traits of themselves they've accepted as part of them being tiptoed around like a taboo