But @GoodJanetBadJanet, not all of the LGB community really agree on the "T" part, that's the point. Some LGB people won't be bothered about having Cherry as chair. It's not about the LGB bit, it's about how you feel about the T bit.
What is is about Joanna Cherry that is so scary? She isn't going to ban being trans, or encourage people to inflict violence on them. She only has reviewing powers for certain policy items at best. Yes, she does have a view on things like single sex spaces and the conflict of womens vs trans rights, but I don't think that she has ever said that people are not entitled to disagree with her. Why is it "scary" that some (in fact a majority, according to polls) people believe that biological sex is at least sometimes relevant?