My son started playing God of War when he had about 3,5 year and is about halfway done. Have finished Knack 2 4 times, finished Lego Marvel Super Heroes. Yes he need to put a lot of effort on the game, but he is learning and is quite good at playing console even if he also plays a lot of ios games.
That's exactly it. He started playing such games early on.
But neither my wife or my nephew did, the only kind of videogames they encountered before were those simplistic Smartphone games like the ones I stated before. Having more than one button is already complicated for them since they never grew up with the more complex videogames on PC and consoles. And they are certainly far from the only ones whose only contact with videogames are their Smartphones. Growing up with a touchscreen as input device and games where you have all the time in the world and only have to touch with your finger or swipe once as gameplay makes even just 2 buttons like on the NES seem complicated. Just look at the React video for Megaman and specifically one person in that video: https://www.youtube.com/watch?v=njzAyjAFCMI
No, she didn't try to do a pacifist run, she didn't understand until halfway through he level that she can attack with the other button. It's a similar case here. It's ovious to us who grown up with it, but not for those who have grown up just with smartphones instead.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454