I think that is the main bee buzzing in realgrandad's bonnet. He says he is concerned about the gender aspect of the threads, but he isn't posting on any of the many non-genderish threads about their content.
If I were a man wanting to change things, I would be posting my male-oriented opinions on as many threads as I could (without being a male chauvinist pig, of course, just politely stating my case) and working to equalise the balance that way.
That was how women changed the male-dominated society that had consigned them to the kitchen, nursery or bedroom - they interested themselves in everything, gained knowledge and experience against all opposition and kept butting into the exclusive men's worlds of medicine, law, commerce, goverment, exploration - you name it.
If you want GN to have equal amounts of male and female contributions, then the males have to contribute - not just complain.