Campus feminism is pretty much part and parcel of other identity politics, and gender ideology and other types of id pol have borrowed a fair bit from it.
And it's not always been good for the academy as a whole - Kathleen Stock has talked interestingly about the results of trying to make university departments more friendly to female ways of thinking/doing. Which in many cases seems to have involved importing a sort of toxic femininity which has not improved them at all.
So in many ways I can see why PB would tend to see it as having had a largely negative effect.
The thing about carrying mace is an odd one. It may be that it's just very difficult to understand the kind of physical reality of being almost certainly weaker if you haven't experienced it. Not as a women necessarily, but for example a man who has done physical labour or sports with women a lot would very likely understand.
It's worth keeping in mind that many women don't really understand this themselves - I've met plenty who think that their strength is on par with mens, or at least close. Like that idiot woman who was at the senate hearing in the US who thought that Serena Williams could easily beat a top male tennis player.
ALl that being said - I don't think that the issue of separate toilets etc is so exclusively about risk. I think more than anything it's about dignity - that is still an important element even when risk doesn't enter into it. People find that a more difficult argument to make though. Which is interesting because at one time it would have been accepted without question - it's worth asking why that has changed, and why we find it so difficult to even try to argue it. Though I think most people feel that way intuitively.