I also think that, as far as I know, no one in the "but women don't want to do science" camp is drawing a distinction between doing science and operating in the science environment, as it stands. For instance, in my lab, you have to be assertive to the extreme- demand attention, argue points before the evidence is in and when you can't get through a single sentence without being interrupted. For various reasons, your average women isn't as willing to do that as your average man is, but it's not a necessary feature of a scientific environment.
I also think that, as far as I know, no one in the "but women don't want to do science" camp is drawing a distinction between doing science and operating in the science environment, as it stands. For instance, in my lab, you have to be assertive to the extreme- demand attention, argue points before the evidence is in and when you can't get through a single sentence without being interrupted. For various reasons, your average women isn't as willing to do that as your average man is, but it's not a necessary feature of a scientific environment.