No one is saying that it's exclusive to Japan. We're saying that the trope exists in American developed games, but it's far from prevalent.
You've been asked to make an argument for this several times now, as I've made an argument for it NOT being prevalent in American developed games, but you continuously seem to refuse, you keep saying we should wait for more videos, and you keep using the word "prevalent" like you're automatically right, and the burden of proof is on everyone who disagrees with you. Then when they do make an argument, you ignore it, and continue to call the trope prevalent.
I don't really feel like doing your work for you and researching all recent american games to cherry pick examples of the damsel trope to string this argument along further. Lord knows that if I did you would just find some other technicality to argue.
But, since you called me on the floor, I am happy to give a very recent example: Halo 4. Don't get much more western or modern than that.
I think we are getting hung up on the word "prevalent." I'm not saying (and neither is Sarkeesian) that it's in every game, or even in most games. Rather, it's in enough games that most (if not all) gamers know it pretty well. I mean, hell, they even made fun of it in Spelunky.
If your argument is that this trope is so rare, or so confined to a single culture's video games, then I think you are barking up the wrong tree. It's not all that rare, and even if it were a Japanese thing (which its not), the fact that Japanese games are as popular as they are in the western world proves that the trope is relevant.