hyperbolic to think that trans women competing in sport will lead to women and children being treated as a sub-human resource
Yes, and you're the one that has said it, so sure, it is.
The objection is TW playing women's sport, and it's one part of a picture which includes rapists accessing victims in prison, women losing single sex provision in healthcare, rape counselling and DV settings, a shift in language and rights to divorce women from their reproductive rights, lesbians having to go back to underground networks to hide from men who want to interlope on their spaces and networks, and on and on.
None of that's hyperbole. All of it is currently occuring, or being campaigned for.
I'm sure many doing the campaigning have malign intent. I'm sure plenty more are just too lazy, blinkered and foolish to see what they're doing. It doesn't really matter. It needs to be fought against, and we will.