The fault line is that the belief in positive discrimination for 'oppressed' groups, which many here still seem to think is a good thing, is what allowed men who pretend to be women to claim oppressed status and gain special treatment.
You are arguing they are not oppressed, which we should actually be irrelevant, instead we should simply state that they are not women.
They used the left wing oppressed/ victim hierarchy belief to their advantage, and it has had very negative outcomes.
The left feminists still seem to believe that the oppressed/ victim narrative and discriminating based on this is a good thing, it just went wrong in this case.
What Lionel Shriver is saying is that it all stems from the same fault line in thinking: when you view all politics through an oppressor/ victim narrative and believe that discrimination based on group identity is a good thing we get to hell pretty quickly.
All that's left to argue then is who is most oppressed and who can we care less about and discriminate against.
The TRAs used this very successfully for a while.
And many here still don't seem to see the dangers in this approach, or the fact that the back lash against this approach is on, and just saying rit is biogoted won't work anymore, because it's not based on biogtry it;s based on a belief it's wrong: morally and politically and will lead to very dangerous places.