American box art

Why does American box art suck ass? Why can't they just use the same art as PAL games?

http://kotaku.com/5446049/another-perfectly-good-piece-of-box-art-ruined-by-americans

Heavy Rain? More like Wet T-shirt Contest: The Game
Surely it must be a mature game for mature gamers such as myself because there are boobs on the cover!

Does this kind of marketing actually work on Americans? Do you buy $60 games just based on the box art?

I have a better question:
Why is it that europeans dont seem to have an original thought in their heads, and must 95% of the time just copy the Japanese box art?
This thread shouldn't be about why america sucks at boxart (we're at least trying), but about how lazy europeans are.