(I am trans-inclusive. I believe trans rights are human rights. I believe in self-identification. I will use whatever pronouns someone choose, and I try not to assume pronouns.)

In the UK recently there's been a bit of a debate between trans-phobic "gender critical" feminists who say that for sexual safety women need spaces that are women only, and that this means they need to exclude trans-people.

I think this is bullshit. I'd like some good quality arguments to use against this.

What are your ideas?

I'm Brazilian, and personally (in the most radical, electability-indifferent and honestly meme-y campaign) would go for Bernie with the campaign finance and tax reform but with a platform for civical reform like putting STV as the nomination method for our chamber of deputies and supporting automating or funding new technologies to replace menial labor, like funding lab grown meat to replace all farming companies and labor now or robotics to automate large parts of the industrial and service sectors and use that money saved from not paying wages to people doing bad jobs to fund free universities and better schools/wages/welfare/infrastructure to the people once doing that work, along with adding civics and economics as subjects in school and always including notes as to where do you use the content you're learning, along with requiring subsidiaries to go independent or drop their branding. Clearly this isn't very realistic so feel free to expouse absurd policy.