Well, one of the many reasons, anyway. (We've "reclaimed" the name Obamacare, by the way, didja hear?) Kate Sheppard, over at Mother Jones, makes it pretty clear with their chart of the day:
Women make less, pay more, and have to put with infinite bullshit to get access to basic healthcare.
So what are they going to do? Dahlia Lithwick at Slate has a much more politically intelligent read of things than I do.