Thats wrong on so many levels. "Casuals" never make or break a game or a system. "Casuals" are the one you have to feed instant gratification over and over again. Wii was driven by casuals. They moved on to the next thing (mobile) WiiU is "dead"
on an MMO Level, Core and Hardcore Players are the ones who create a thriving community (if your game is good) They are the ones who have core or casual friends. Thats the rat-tail phenomen. If you cater to Casual userbase. You must feed them instant gratification on a constant basis.
(Hard)Core players are fine with a challenge and play the games for months on end. Their social circle that comes on every so often or only plays because their hardcore friends plays, is the foundation of a healthy MMO.
Without the core you dont have the thing that binds all the players together
You clearly did not read my comment. Please re-read again and then think.