I agree that women should be able to have their own spaces because they want them. They shouldn't need to show that they've had trauma.
But this article is about trauma healing classes so it's very relevant to the story.
I also like it because it helps to educate people that you can't reason your way out of a trauma response, it's an involuntary physiological reaction to situations, stimuli, etc. If you react badly to men because of past trauma, having trans women in a group will make it very stressful and unsuitable for women trying to heal from that trauma. It could easily exacerbate problems instead of lessen them.
I used to be shocked at how many people didn't understand this. Many think that if you reframe your trauma or accept transwomen (in general), you won't have a trauma response to transwomen in single sex spaces. But that's completely ignorant of how trauma responses work. It's very similar to the misconception that Tourette's verbal tics show your true feelings. No, you have no control over either. I've had trauma responses to good friends. I didn't think they were bad people, my body had a physiological reaction. I think it's important that the public - and policy makers - understand how trauma responses work and also how difficult they make life for those who have them.
I also think that explaining trauma responses will lead some to understand why some women need single sex spaces. Many people start off with "be kind" and only start to understand the need for single sex spaces when they see something that seems unfair or harmful. I think many can understand why a woman who's been raped wouldn't want to be around men, especially when dealing with their rape. Once they see how that's a problem, they often start to see how transwomen in single sex spaces leads to other problems too.