When you read literature that is considered canonical by some standard ('Wester' in Bloom's sense but also whatever else is considered a must read by any other culture) that was written by women, you might notice that a lot of the action revolves around female emotions, being a woman in the world, gender, gender contrast, romance, and similar. Maybe what in a constructivist sense we might call 'female' topics. I'm aware that there are also women that wrote about non-'female' topics but not many were preserved of those. Why is that?

If you look at preserved literature written by men, it's about anything. Sometimes also about the experience of being a man in particular, many times also about any other business. I think one salient reason for this disparity is that men were societally allowed to write since basically ever. There was never really a time, where you weren't allowed to write. Granted, some men had to work hard and couldn't afford to write. Even worse, if you were a slave, of course that would be triply hard. But whenever men had it hard there was mostly a women who had it 'harder', societally speaking. Maybe she didn't have to go coal mining or logging but from her rights and what she was able to do in society, she was always lagging behind.

Your reflections on your gender, caste, color, status, etc, comes naturally. Most people think about that at some point. Once you've grasped these concepts to a satisfying level, you start thinking about other things. I think women were so long essentially banned from writing that there is sort of a lag today, where women are still in the stage of setting and establishing themselves in the world. Just as a natural progression of what is of interest to people. As we learn from e.g. Criado-Perez' Invisible Women, through the ages, most defaults were men. The default human, is a man. A lot of thought comes pre-fabricated for men. The extra mile for women or what might be different in the female experience, was rarely gone, so women in a way 'have to catch up'. A woman had to write Invisible Women to talk about a problem that (most most) men don't even face. Debunking the patriarchy, as much as men really ought to help, is being catalysed by women. Extra work that manifests in sort of topical one-sidedness. Many slaves wrote about their liberation/liberty/slavery, because of course they would. The (white) patriarchy dominates the capacity of some strata of society so much while other people (men) almost don't feel it at all.