Yes, part of it is because Labour's base has many leave voters. This screwed Labour in 2019 as no-one could square that circle (amongst other problems).
But also: even if there's a very real "brexgret" thing, good luck getting anyone to admit they voted wrong. "Leave" became such a central identity to many people that poking that would have unpredictable emotional reactions.
Given how long a rejoining process might take anyway it's better to leave it for a while, make some smaller and less controversial agreements with the EU.
You don't understand, someone was rude to her on Twitter.com
But yeah. She has no trans friends because trans people don't become millionaires. She has no trans coworkers because she has no coworkers. She hasn't been in a women's toilet at a train station and experienced a bloke in a high vis knock on the door and shout "Maintainence!" in a long time and has forgotten how these things work