It doesn’t make sense though does it?
‘TP’ are only unfairly discriminated against for:
- Gender non-conformity and defying sex stereotypes. This is sex discrimination.
- Homosexuality or presumed homosexuality. This is discrimination relating to sexual orientation.
- Neurodiversity or mental illness. This is disability discrimination.
- Belief in genderism/queer theory. This is discrimination based on religion or belief.
Whilst that is absolutely logically true in a world where all discrimination is successfully prevented, I think it's complicated in our imperfect world by how embedded sex discrimination is in our society.
There is unfortunately lower representation of women in some areas (especially senior roles) and they are paid less than men in the same roles.
This could leave a MtoF trans person without a female comparator to prove discrimination. And any comparator is probably themselves already being discriminated against - so the bar is lower already.
Yes, that is incredibly unfair to women. But it isn't a race to the bottom. And I don't think it's reasonable to make fairness to Trans people depend on fairness to women being achieved first. (Equally, we won't let fairness to women depend on fairness to Trans people being achieved first - hence women's sports must be protected even if there isn't a solution for Transwomen yet.)
I think Trans people should be protected from any genuine discrimination. So Transwomen need to be able to use men as a comparator, which means gender reassignment needs to be a separately pc.