I don't know that we disagree. The SC ruling by definition is what the law always meant. So, the EHRC guidance should always have been to exclude trans individuals from single sex services and spaces corresponding to their acquired gender.
The Supreme Court ruling took out the fact that sex as a protected characteristic could, (as written by the Labour government of the time) be impinged on by the GRC. which is why Labour very kindly added in the clause that "where proportionate" trans women with a GRC could be excluded from a women only service to make it truely single (biological) sex.
The EHRC could not write anything that didn't conform to the law as written. But did recently say the GRA / GRC should not be part of the EA because it impinged on the actuality of sex as a protected characteristic.
The Supreme Court ruling didn't go as far as that but did give sex as a protected characteristic the same right as the other characteristics.
But did nothing to address the vaccuum that those with a GRC are now in.
And important to remember that this ruling only applies to the EA.
ie as was the case in the past events or whatever could have been advertised as being for women and trans women so long as they didn't quote the clause about (proporionate) single biological sex events.
So technically ERCC could have got away with employed a TW but just not advertising the post as only be open to biological women. Which of course they did to promote their politics.
And this in fact is what is happening now. All those who have been Stonewalled and think the Supreme Court ruling undermines them are being totally silly.
Any one who is gender non conforming, or self identifying, and all those other performative lifestyles are untouched by the supreme court ruling as they never were part of it. They have just adopted a life style.
So part of all the fury is all those people who have been conned by Stonewall Law (which they admit is legal) are making a big fuss.
And unfortunately too many institutions are similarly in a quandary because they responded to what is a social movement, not a law, that people can make demands based on their life style.
So the quote about lesbians having to accept isn't about the law, it is about the fact that too many lesbians, have either been bullied or genuinely believe (or want to be seen to believe) that TWAW.
The Supreme Court ruling does absolutely nothing to change that.
There were and still are laws around toilets that say there should be single sex provision. The problem is that too many institutions and employers got caught up in the trans hysteria. Mainly because they had no respect for or it never entered their head(s) that they were impinging on women's sex based rights.
And the Supreme Court ruling hasn't change that mind set.
Sad to say, despite court rulings, and data, and surveys, the voices the majority listen to are the trans voices.