Nintendo is a platform holder, not a random 3rd party software provider. As a platform holder they need to keep all kinds of gamers and niches happy. 1-2 million people is big enough of a group to be important for a platform holder. In particular when it's core gamers, which are the foundation of every successful console - including the Wii in the beginning. Maybe as a 3rd party you can piss off most of your fanbases and do nothing but phoned-in 2D platformers and minigames that ,,sell best". But not as a platform holder. Otherwise you'll end up with the WiiU. I.e. a terribly monotone library which was rightfully rejected by everyone on the market except the most hardcore of the core Nintendo enthusiasts. That's why Sony is smart banking on things like TLG and Bloodborne whenever the time is right, even though it's not gonna be a calladuty-level hit. On the other hand, shitting on fans of Metroid or other core series because ,,it only sold 1,5 mil" and not even providing proper equivalencies for them is dumb and shortsighted.