As far as shamelessly repetitive and unimaginative genres go, you can do worse than the "Childless-Urbanite-Inherits-a-Baby" one. Sometimes they're actually kind of funny, and even when they're not, there are far fewer of them than there are bad rom-coms and bad horror movies (clearly the two most shamelessly repetitive and unimaginative genres in existence) so you have less of a chance to accrue a white-hot hatred of them. Literally the bare minimum anyone asks for with these things is that you shake up the formula a little bit and do more legitimate screenwriting than taking the Raising Helen script and changing the character's names and locations and calling it a new movie. But, unfortunately, Life as We Know It didn't care to put in that much effort.
It's a veritable chick-flick apocalypse! Rom-com-aggedon! Estrogenocide!