I don't understand all this vitriol directed towards the Supreme Court judges who clarified the law on the EQ (or maybe I do, because TRAs are fucking insane).
The judgement didn't say that any of the judges AGREED with the Equality Act's definition of sex. Those judges could be paid up members of every rainbow PRIDE group the length and breadth of the UK, for all anyone knows. They simply came to a decision, "this is what the law says". That's all. They weren't asked to rule on whether or not they agreed with it.