The single most masculine subfield in the study is the mathematics of Riemannian manifolds.
The usual way to think about this is that this represents a crisis. Steps Must Be Taken to smash the glass ceiling holding women down in Riemannian manifolds so that they can bring their valuably diverse insights to solving Riemannian manifolds, whatever those are. The sacred goal of Diversity requires homogenizing every field of intellect!
On the other hand, my view (being a Larry Summers-like thought criminal) is that children and other living things are important, and I'm glad that smart women are working enthusiastically on subjects that they find fascinating.
In contrast, luring would-be dance ethnologists into studying Riemannian manifolds is just going to waste the time of the current Riemannian manifold experts and annoy the natural dance ethnologists. And bribing smart female cancer researchers to go instead into Riemannian manifolds strikes me -- somebody who had cancer back in the 1990s and is greatly appreciative of the work of cancer researchers, male and female -- as not a win-win proposition for society as a whole.