Yeah, if you think about it Japan and Fiji are 9th and 10th, but they definitely don't have the top players in every position. You could argue for a few outsiders like Sergio Parisse, but 10 is still a lot. Your likely to get 2 players from 1 team at some point too. On top not many people watch rugby to the point where they know how good every player is in each squad across the world. Fans of SH teams will know those better and fans of NH will know those players better.