Some of the arguments that are put forward "this person is bad, so doesn't deserve as many rights", "these people are nice/vulnerable, so deserve to be accommodated" illustrate some of the mischaracterisation of the broadly GC position. We saw some of it in JR's questioning of the SM witness I think. Something along the lines of "you think people will or are pretending to be trans to get access to SSS" and we see it in the "you think all trans people are sex offenders".
It's far simpler, as has been said over and over again. SSS are separated on the basis of sex. The very fact the separation is allowable means that the case has effectively already been made that there is a need for that separation on the basis of sex - biological as clarified by the SC ruling. No male, nice, nasty, in a dress, in a bra, in dungarees, 103 years old, always lovely to his mother or whatever should be in there, and no female nice, nasty, racist, salt of the earth, terrible c*nt, or whatever should expect to have to share that space with a male.
That's it