I'm puzzled as to the reasoning behind berating us for addressing a claim made by an opponent in a debate. Any claim made about large numbers of people can and should be challenged. It's not much of a debate otherwise.
Now I tend to stick to the impersonal points, such as the low quality study referred to by RMW. Not because I don't have strong feelings about the particular claims about passing. I do. But because I am hypervigilant and have long since learned that I perceive even those males as male who may otherwise pass, at least at first sight.
So I will pretty much try to ignore all claims about passing from someone who has gone through a male puberty because it's just a hard no from me. And mostly I don't feel like explaining what hypervigilance is, let alone how I come by that particular trait.
Also, what I'm concerned about is not how well someone passes, but how perception is here treated as universally uniform. There's a reason why we have that saying that beauty is in the eye of the beholder. Because perception is wholly subjective. I may hope to be perceived as capable, polite and smart, but I cannot force that perception onto anyone. At best I can hope to be judged by my actions and by my words, but at worst I may say and do exactly the opposite of what any given individual considers to be capable, polite and smart.
There's no way I would ever argue that my view must be the right one because people perceive me to have a particular characteristic. For starters, I have no way of knowing how everyone perceives me. And I have no way of knowing if those who tell me how they perceive tell me the truth or say what they think I want to hear or what will hurt me most. And then I cannot know if I define that quality in the same way as everyone whose perception I have relied on. Last but not least, even if people perceive me in the way I hope, that has no bearing on the validity of my argument unless the entire discourse is wholly limited to arguing about how I'm perceived.
Which this debate is not, given that it is about the political implications of the doctrine of gender identity. Which go way beyond how one individual member of society may be perceived by another.