My question would be 'why should I care?'
Recognising a third gender doesn't affect me, at least not in a negative material way. If people want this and it's not detrimental to me, why are we debating this? Let people get on with it if they feel it helps them.
This is my question too.
This mentality of dismissing/resenting anything that doesn't conform with a certain mindset, whether it has detrimental effects or not, is baffling to me.
Why is it impossible for some people to accept that not everyone is like them and there is nothing wrong with that?