By "natural" I mean up until 1950s(?) society assumed that certain services, whether through local government or charity or whatever, would provide them as single sex.
ie why the very concept of the "urinary leash" was a very real restriction on women's lives.
Nobody started a campaign to have unisex toilets, did they?!
And even though some of the sex divide in terms of provision was also about sex stereotypes, women became nurses, men doctors and so on, this did not undermine the underlying principles that in certain situations it was appropriate that provision was single sex.
So what the influence of the GRA had on the EA was it put into law a change to accepted cultural and personal preferences more in line with China's cultural revolution.
That's the issue.
No other protected characteristic has told that characteristic that we recognise that you suffer discriminate because of your age, disability, etc., but we are telling you that someone who identifies with that characteristic as the same legal status as you.
You might find that simplistic, but that is the fact.
No other protected characteristic has the very basis of what it is based on, material fact, been told that your material fact can be challenged by, effectively undermined by, a group that politicians decided could be considered equal to legally through identity, which on occassion requires surgery.
You wouldn't expect people who are part of a Black or other minority group to say, yes of course we accept people who have adopted through presentation that they are the same as us. Let alone (and they do exist) people who "aquire" or claim a disability.
So by allowing the thought process / belief behind the GRA to temper what would otherwise have been just listing the ways in which someone might be discriminated against because of sex or race etc., when then twisted, perverted to encompass a belief set of a minority group.
So on one level although you would think the EA would be a mile stone for women, it has become a step back. Sex is the only characteristic that has lost its unique reality.
Shame we didn't stick with the Sex Discrimination Act. Have never heard what the rarionale was for parcelling different groups into one act.
So the writing of the EA to accommodate the GRA (un)intentionally put into law that sex can be claimed, which no other characteristic can.
The law of unintended consequenes. And as usual they are bad for women.