Are you going to defend the poor sales of games like Metroid Federation Force, Devil's Third, Codename Steam, and Star Fox Zero? This year has been much better for Nintendo (I don't think they've put anything too bad), but the notion that everything Nintendo publishes is gold is so odd. 2016 wasn't a good year by any measure.
I didn't make a statement that everything Nintendo publishes is of high quality, so I have nothing to defend here. The thread title doesn't ask about all Nintendo games, but the average (=norm in this context) Nintendo game. The norm for Nintendo games is that they are quality products and some outliers don't change that.
You called half of Nintendo's output garbage, so you have certainly a lot more defending to do than me.