Fad based/casual fans are fair weather fans, and not reliable consumers.
Alienating your dedicated consumers in favour of making big money in the short term may seem appealing, but when gaming stops being the cool thing, and your dedicated fan base has been pushed away, what do you do?
I will say that the Nintendo fans and just game fans in general (thanks to the internet) have had a large part to play in the far more cynical approach to gaming, as well as the inevitable consequence of big business expansion emphasising shortcuts to profit rather than being a stickler about what you develop, but at the same time, marketing to people who don't truly love your product with the knowledge that they never will is a risky business imo.
I mean it's not to say it will end up imploding, Apple has pretty clearly shown that they can continually churn out complete crap and just keep on growing, but I still think that's more of an exception than the general trend. Nintendo isn't like Sony or MS, those two can deal with financial failure of consoles because they are multimedia giants. Oh no PS3 isn't doing so hot, it's okay people are buying a bunch of Bravias. Oh no Xbox isn't getting off the ground, lol didn't even cost a billion to develop no big deal.
Nintendo doesn't really have a safety net, and so while gambling is good, gambling should be in the form of trying to secure new lifelong fans, not pushing them away in favour of fickle ones.
But I mean, I'm just some dude behind a laptop and Iwata and co are experienced CEOs so I'm sure they have taken all of this into consideration and are taking the best course of action.
Or not.
Time will tell.