Well, personally I have better things to do (football, beer, reading FHM, swearing, computer games, teaching DS to ring doorbells and run away, ogling other women's breasts, thinking about sex every 0.3 of a second, chewing my toenails, keepie-uppies, darts, shaving, talking about football, oozing testosterone from every pore, insert stereotyped male pastime here) but my DP makes me.
It's got nothing to do with the easy availability of help, advice, comment, opinion, and the fact that for any situation you encounter there's probably already a posting about it (along with several suggested solutions). It also has nothing to with the fact that if there isn't already a posting on a subject, and you post about it, you're pretty much guaranteed an array of folk will be eager to share their views and opinions within a short space of time. Nor has it anything to do with the fact that most men's sites parenting tend to be short of actual people, unlike here. And it's got nothing to do with the fact that some men actually like reading and occasionally joining in the gossiping and moaning and bitching that goes on here.
A Y chromosome and a brain aren't necessarily mutually exclusive...