Some female people with transgender identities who have used testosterone to change their bodies to make correct sex identification harder for some other female people have come onto this board and have shared their experiences with us. They understand that their decisions may cause other female people distress. So they make great effort to plan their days so that they can find alternative solutions.
They also state that they do not wish to be leveraged politically to convince any person that male people with transgender identities should be allowed to access female single sex spaces. Yet, you are doing so here.
Just because some female people have taken steps that may distress other female people if they use the female single sex spaces is no reason that female people have to accept male people in female single sex spaces. While many female people can reliably correctly sex a male person, they may have difficulty in correctly sexing a female person who has taken testosterone.
'Bottom line is, trans people will use their preferred toilet that suits them best and you can’t really stop it without rigorous genital policing.'
Are you saying that male people with transgender identities will not respect policies and any law that might be enacted and stay out of single sex spaces? Is that really what you are saying? That they cannot be trusted, yet we have to accept that they should be trusted not to harm female people? Wouldn't that be contradictory?
In the past, female people did things such as left a space they saw a male person in that should have been single sex, they told other female people in the space or as they were about to enter that there was a male in that space, or they alerted security or called the police. We didn't need any ridiculous hyperbolic notion of 'genital policing' then so the assertion that it is needed now is remarkable.