I don’t really think that’s a left/right thing. JKR is fairly left wing and we all know the abuse she’s received. These sort of debates are always hard for progressives because the likes of Nandy, Rayner, and Starmer always have to consider the ‘rights’ of trans people whereas reactionaries can dismiss them without losing political capital.
I have a ****age daughter who thinks trans rights should be absolutely respected while her brother asks if ‘I say I’m a carrot, does that make me a carrot’? I’m not sure who’s right tbh. But you’re right, I know which way the evidence goes.