I think the point is that there are both boys and girls schools, but only women's only colleges.
Indeed. The women's only college date back to the days when women couldn't be awarded degrees or use all of the University's facilities. They were necessary female spaces back in those days. They may well not be needed any more. But that most certainly is not 'the point'. It would be the point if the college was simply going co-ed, but it isn't. What it is doing is getting rid of the requirement to be a biological woman, and instead accepting those who merely self-identify as women. But it is still calling itself a 'women-only' college. In other words, it is trying to redefine what a woman actually is.
You object to men self identifying as women? And vice versa? Isn't that a bit anti equality and diversity?
It depends what you mean by equality and diversity. I support the right of a male-born person to wear a dress, high heels and makeup, adopt a female name, and use female pronouns if she wants. I also respect her right, provided she's an adult, to use hormones and surgery to make changes to her body. She should be able to go about her business without being verbally or physically attacked. She should never be denied housing, work, healthcare or any other rights on the basis of her gender presentation. But I don't support her right to access spaces that were specifically set aside for biological females, to counteract disadvantages that have been conferred on us on the basis of our sex - not our gender. Murray Edwards College used to be one of those spaces, but it could be argued that in modern times a women's university college isn't needed any more. But there are other women's spaces that most certainly still are needed. Prisons, rape crisis centres... virtual spaces like academic awards... women's sports... If we support self-identification, we support the notion that any male-born person can simply declare himself female and access all those spaces. Taking sport as just one example - imagine how much diversity there would be in the Olympic records in ten years' time, if that were allowed to happen. The women would all be gone.