If you have a people who are willing to pledge enough for you to make a game that they enjoy and leaves you net positive in the bank, I think that's a worthwhile enough cause. There are plenty of creative people who are just as happy (if not happier) making things for a smaller but more passionate fanbase.
The traditional AAA game industry is build based on the idea that targeting the mass market is the only viable business strategy; Kickstarter's been getting so much buzz lately because it's one of the few examples in modern gaming history that suggests there might be a commercially viable alternative for those who would prefer, for whatever reason, to not operate within the AAA model.
