For me personally the erosion or potential erosion of sex based rights is a huge one.
The much spouted toilet issue is a bit of a red herring as to accept rights based on gender has huge implications for women.
If we base laws based on gender then transwomen are legally women. This means that they would be placed in women’s prisons, mostly containing very vulnerable women- google Karen White for evidence that this has already happened in the uk.
Rape victims, rape is defined as using a penis, something most trans women possess, can not demand to be examined by someone not in possession of a penis.
Women’s refuges can’t not admit women in possession of a penis as remember, trans women are now legally women.
Rape victims in court may have to refer to the accused as she, something that has already happened in the UK.
Trans women will be able to compete as women in sport. This is already happening at elite levels and will become evident in, I believe, weightlifting at this years olympics.
Also, there is moves to accept trans women into women’s rugby, again this will include those who transitioned after puberty and in possession of a penis.
So it’s not quite a simple as being comfortable with the toilet situation but with having no sex based rights.
This is not an attack on transwomen who the vast majority just want to live their lives in peace and deserve to be respected and treated with dignity. But whilst ensuring that we do so, we shouldn’t just give up our much needed protection and safeguards as we all know that predators will use whatever means to find loopholes to attack women.
Sorry don’t normally make long posts as on my crappy phone but I just wanted people to understand what is being pushed for.