Why do you never see women taking the trash out for a living? There was a big article in a local paper about the first two female refuse collectors - they weren't exactly dainty looking, I'll tell you that (obviously physical outliers for strength). There must have been thousands and thousands of men go through the position over the years, but now there were two women, quelle surprise.
Can't the same be said of deep sea fishing, oil drilling, mining, road maintenance...The list goes on of things which women are almost completely absent from and don't seem to be banging down the doors to enter either.
Let's be real, the kind of man who is interested in spending more than 10 minutes thinking about hi-fi is probably not that common either, what 2 or 3 in 100? Then for every 30-50 of these men, there is probably 1 woman with the same degree of (obsessive?) interest.
I don't know why people pretend to be shocked that men and women are different and the kind of men interested in this hobby to the extent they are posting on a forum about it are different enough within the range of male behavior, within female behavior it would be true outlier behavior (perhaps even seen as anti-social by other women, more so than with men).
Nobody seems to ask why there aren't more straight men doing make up tutorials on youtube, when there are thousands upon thousands of women doing it. Does it really matter, is it even a sensible question to ask in the first place?