Heres my opinion.
Speaking generally. Women are social creatures, they seem to get excited about seeing friends, catching up on the gossip or watching TV. Maybe it comes from childhood, where the girls are groomed into thinking, they must be pretty act nice and do house things,where as us boys run around shooting people with very branch looking Uzi 9mm's, building dens and rooting around for bugs, fish and other odd things. I think its nurture rather than nature. Im sure they are very capable of creating great scape's. But remember, this hobby is still relatively new to the west, so its perhaps just a case of them not knowing about it.
To summarise, I think its nurture rather than nature,its possible its too time consuming given that women are more social animals than us men, its to practical at times for them, again this could be down to nurture, tom boys may not have any problems.
I think hobbies in general are very male dominated. I think us men need things to do, its the hunter gatherer in us I think. We need to be creating, thinking, and using our hands.I don't know of many men who like to sit around in front of the box every night, where as I know plenty of women who do.
Good debate, but I think unless we have access to social experiments and behavioral studies, we will only be guessing.
Cheers.