BIB - nobody says that. It’s actually the same argument as “not all men” - no, not all men are dangerous, but how do we tell which ones are and which ones aren’t?
It’s the same concept, because we do not believe it is possible to change sex (it biologically isn’t), and what does “living as a woman” mean anyway? Usually it comes down to an offensive gender stereotype.
I don’t believe all trans people are dangerous, neither do I have a problem with them existing. I support trans rights in terms of them having equal access to healthcare and housing, not being discriminated against in society, not being subject to abuse and violence.
What I do not support is their need to use women’s facilities. They are physically different from women, even when they’ve had surgery (which is not something I support - SRS is a hugely devastating con that leaves people infertile and in pain, but that’s another issue). They are physically of the sex that oppresses women via their sex (sorry, clumsy sentence!) and there is no evidence that shows the rate of sexual crime in transitioned male to females is less than in males.
There are also more issues beyond this that I am not happy about - for example, modern trans ideology is unfair to women in sport, is dangerous to children as they can be left with lifelong health issues from unnecessary medical intervention, and less importantly but still an issue, as a feminist I find that transgenderism is pushing a strict gender stereotype and binary, despite claiming otherwise. I am uncomfortable with that.