I think the strength of Kickstarter lies not in the money, but the community it creates around your project.
Don't get me wrong the money is the reason people put their games up, but I think the long term value of it is that it creates an audience invested in your project. It gives people the opportunity to have been with something from the very start, and a personal connection to a game that they wouldn't otherwise have.
The one weakness that I see is it has the potential to harm a game if the Kickstarter fails. I have wondered, but not done any research, about projects that go forward even if their kickstarter failed and whether or not they have found success or if they are forever branded as "that game that people didn't like enough to kickstart".
I just backed a project that failed. It isn't a game but a movie. Still, people who back the project are willing to back the project again, asking the creator to start again with lower amount of goal or move to IndieGogo with flexible funding.
I think your first sentence is very true though. You could create a very strong community around your work, and to me the project I mentioned show that you'll still get to create community regardless whether you actually reach the funding goal or not.