"Not all trans women have a penis and testes. Where they do they tend to be exceptionally private about them."
This is a lovely blanket statement and overgeneralisation.
In fact, it can reasonably be said that around the same proportion of male people with transgender identities are 'private' about their testicles and penises as all other male people.
This is where robust safeguarding risk assessment comes in.
We have the MoJ prisoner statistics that can be used to show that male people at any stage of transition do not have a reduced risk of committing sex crimes when compared to the rest of the male population of the UK. There is absolutely no indication that this group of male people have the same risk of committing sex crimes as female people.
It is this blind adherence to statements such as this that show a level of ideological belief to the exclusion of being able to make rational and reasonable decisions about this group of male people.
And it all seems to come down to some posters who wish to present a case that some male people with a philosophical belief that does not reflect material reality should not be treated as all other male people. It comes down to some people believe that this group of male people, those with a philosophical belief that does not reflect material reality, should be excluded from legitimate discrimination.
Remember, of course, there is no biological or neurological markers that can be used to test whether someone is 'transgender'. The only commonality that this group shares is their philosophical belief. Laws and policies around safeguarding are not shaped by the potential of future discoveries, only what is known right now.
The questions that always remain. Why does one group of male people expect to be treated as if they are not male based on their philosophical belief when this belief does not reflect material reality?
Who benefits from this? (and the answer to this is 'Not female people or children')