Thank you for your heartfelt response. I can see how broad sweeping rules against trans people would cause great pain, but similarly I see that broadsweeping rules in support of trans people in terms of access to female-only spaces and the right to compete in any and all sports in one's preferred gender category at any point during transition would lead to issues for others.
I can see how the reality in any given case is far more complex and likely it would need to determined on a case-by-case basis if a trans woman offender should be placed in a women's prison, for example, or if a trans woman athlete is sufficiently feminised to be a fair competitor for the women's category. But there it is again... The unwanted interrogation.
The search for 'femininity' or 'masculinity' in the blood, in the cells, in the bone, in the mind. Is there any fair process here? Do we need one? Do we do away with all of them and put cis women at risk?