I can only speculate based on my own experience, and I'm not a mathematician (I'm a physicist, and an experimental/industrial one.)
But I've never been a person who went to the internet with technical questions even though I've always been a person who spends a lot of time on the internet. I prefer to ask colleagues in person. Mostly, I think, because I want to be able to ask follow up questions and get immediate answers, and then ask more follow up questions about those.
But maybe there's something gendered about that? Maybe guys find it more embarrassing to ask questions in person that reveal they don't understand something? (Though revealing that to the whole internet under a real name seems more embarrassing to me.)
Right now I feel a little weird trying to be helpful on public websites, too, because I know my answers are going to be harvested to feed large language models.