I could blindfold myself and throw darts at a board. The fact that I hit the board sometimes doesn't mean that the blindfold isn't an impediment.
Many more movies fail before even reaching the screen. Just because we see some success doesn't mean that the culture isn't an impediment to success. Perhaps a different culture would produce many more successes.
We would need a lot more data before we could draw any such conclusions.
Edit: I see that's exactly what you're saying from your reply; "...such culture is not an impediment to success." I disagree; we cannot draw that conclusion from the data.
Extra edit: Oh, your answer has vanished.
