I think it's largely because women that read or watch this particular genre, identify more with female characters and would rather imagine what the male characters are like on their own. Give them false identities.  By the writers not describing the men's lives in depth, viewers, like the female characters, can't get too attached.  Or maybe it's that on Sex and the City part of the philosophy of the main characters is that they never seem to get too attached to any of the characters in the earlier episodes largely because they are men that just seem to come and go and this helps women further falsify their stereotypes about men.  For this reason, I don't think a book such as Eat Love and Pray would be any better if told from a man's perspective, however I do think it would be interesting!