Yeah, sex can get really weird and if you want to break it down a lot is certainly doable, but is honestly not worth it. Thus we go with the simpler innie or outie for female, male. At least that one gets you to a close enough to know their sex without overcomplicating it. That's why it's fair to call her female in just about every way now. Just that if they care for your sex period, including what it was when you were born, there's the rub.
But yeah for the promotion as it stands, until guys are okay in overwhelming numbers to consider her current status as the answer to whether she should join or not, you won't get anywhere. Think that's a given though. You would need to change the thought process from born male, now female to either born female with male genitalia, born doesn't matter, or I dunno what else. Still all tied to the sex there.
Just that the former ain't happening anytime soon because what we have is simple and works. The latter is more social progress, but you're asking a would you hit it contest for that so uh...
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The King Wang.
Listen up Urinal Cake. I already have something that tells me if I'm too drunk when I pee on it: My friends. - Colbert.