It's actually not that difficult in the case of someone like Peter Scholze. There's a good deal of scientific journalism available and some more accessible meta publications. But I guess public interest in crystalline cohomology isn't very distinct. Turns out a scientist's lack of visibility in the public eye via publications like Wikipedia is shaped by more than their gender.
the previous commenter wasn't entirely being sarcastic. You are correct, a big part of the reason that certain topics are covered more than others is literally just interest by authors. There are many many more people interested in writing about video games etc than there are interested in writing about field's medalists. The best way to solve that problem is to either get writing yourself or encourage others to write.
