I think most people if questioned would say they believed men shouldn’t be in women’s spaces (physical or political) and you cannot change sex.
The thing that has made people so naive about it all is all the ‘well disguised’ trans males we have to point to. Oh, and Hayley Cropper

Famous celebrities and influencers can afford to have all the feminisation surgery they want. Then they have huge crowds to listen to the talk about ‘my true self’ etc. The public then have THAT as their point of reference.
The more cases like Isla Bryson become known, the wider the reference point becomes and people start to think, ‘Well, how is this man (IB) different to Blaire White in terms of saying he’s a woman?’ They both say they are but one has had boobs, lips, nose, forehead surgery and has lovely hair. The other has donned a blonde wig. Both still men and both still intact.
Is it literally JUST how ‘feminine’ someone is that stops people thinking they could still be a danger as ‘SURELY they wouldn’t go through all that surgery’ type thing?