You're trying to infer sex from gendered appearance. You're not looking at primary sex characteristics, or even secondary sex characteristics.
And are you actually asian? I understand there's certainly Chinese living in Scotland, but are you Chinese?
I ask, because of the well-known
cross-race effect. So I wonder how competent you actually are, to infer the sex of someone of a different race than yourself, from their apparent gender presentation.
Again, I think you raise some good points in this thread. I just very much disagree with you about the propriety of this particular line of argument.