In almost all cases, I am in favour of no gender-restrictions or discrimination. As are almost any reasonable people. I am a strong believer in judging people on merit. However, it's wilful blindness to say there aren't some roles where it should be a criteria. For example, if you are a woman's representative, a rape counsellor (for female victims) or similar, it is not unreasonable to favour a woman for the role. With trans-activism, we are seeing men forcing their way into these areas against the desires of many women. Example: Lily Madigan, Labour's recent appointment as Women's Officer.
Lily is a male, at the age of around eighteen, iirc, decided he was a woman. Not only decided he was a woman, but insisted that trans-women ARE women and that "they are vastly more under-represented than most", claiming greater victimhood in the usual SJW hierarchy of oppression game of Top Trumps because male women are even more oppressed than regular women. He stirred up a minor ****-storm about an in-place women's officer accusing her of being transphobic until she was made to resign. He says in interview that he wanted to become a women's officer because he disagrees with the views of many female women's officers and he also believes in silencing debate that he regards as transphobic. (Read: objections from women to him representing them).
For the guys reading this, consider a scenario where you had an organization dealing with issues particular to men and had an angry Feminist appointed as your representative and any objections that she didn't actually represent men fairly shut down because you were "misogynistic".