Rob1 Mumsnet gets around 20,000 posts every day! My takeaway from that is the women are quite happy to engage in fora that interest them. If Mumsnet is not the biggest most active UK forum, it is certainly in the top ten.
We need to remember that going into the tiniest detail of puck prep and water preparation is quite niche - only a minority of the millions of people who enjoy coffee are interested in discussing these intricacies. Even the desire to own a manual espresso machine is niche - Hoffman is always reminding his audience that he doesn’t have a machine at home, warning that it will become a hobby.
People often joke that boys never really grow up - men just have more expensive toys. I know that applies to me and I suspect others on here.