And that’s precisely what this judgement should help enable - by underlining that, in equalities law, that there is a clear, coherent and consistent difference between a woman and a trans woman. (Which of course was always blindingly obvious to most, because otherwise what on earth were trans people transitioning from or to?)
As I see it, living as a trans woman means living knowing that you are biologically male but wish you weren’t, and a good and just society is able to make you feel more comfortable in that by, for example, using the pronouns you prefer, accepting you dressing in traditionally women's clothing, letting you live free from abuse and discrimination, etc. And indeed offering you medical interventions should you wish for them.
After all that, it may well be that this person passes in such a way that they can also use, for eg, female toilets and changing rooms without challenge, and indeed navigate the world with most people thinking they are female.
But they are male. They always were, and always will be. And that’s fine and beautiful.
This is not, and should never have been twisted into claims that trans people don’t have a right to exist, or even a right to thrive, to live without fear and discrimination. What they don’t have a right to do is claim discrimination on the basis of a sex which is not theirs.
(As an aside, the whole thing will hopefully get more people realise how blindingly backwards it is to use sexist language like ‘identify as a woman).