A lot of these Nintendo games are from years ago, and they are still make up the top 10 above more recent 3rd party games and like you say these Nintendo games are only Physical sales, yet still they are outselling 3rd party which are physical and digital. I think you have just proven my point
Only because you didn't answer the question: What was released lately that was worth showing up in the charts? You really need to go a couple months back to find something, and considering games from third party publishers are in 99% of the cases very frontloaded, they don't have a chance to show up anymore by this point in time.
Also, again, you're talking about the US sales on the japanese preorder chart, where you can see several third party titles charting in front of Nintendo's own titles or any PS4 titles, disproving your point already right there.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454