What are you even talking about? You're almost seeing this as a civil war between two fractions of Mario fans. Now we know why recent Mario titles have less story, because you've lost the plot.
Also the 2D Mario titles aren't a substitute for 3D Land/World. Just because the latter plays closely to the 2D rules (powerups, one objective levels, timer) doesn't mean they play the same. They both provide different experiences. Being a fan of 3D Land/World has nothing to do with thinking 2D games are superior.
Since NSMB we've had four 2D Mario platformers and four 3D Mario platformers (not including Mario Maker). No one is taking away your games.