As a person who has helped kickstart several games before, I can tell you that "kickstart with hype, then wait a year or more" is extremely common in most kickstarters, even with ones backed by professional game companies. For example both Mighty No. 9 and the new Shantae game went through the exact same process. It's very normal to have to wait for quite a while, and yeah, you shouldn't be planning to be hyped all of the way from the kickstarter to release as such. Rather the advantage of most games like this in the kickstarter is that (should you choose to do so) you can help provide feedback and game creation advice as the game is in progress (either by voting on character designs, level ideas, etc.), instead of just getting the finished product as-is.
From my experiences there's nothing wrong with kickstarting things, but it is important to remember that this isn't a pre-order. Games (even professionally developed ones, as I've pointed out) might take a couple of years since the kickstarter before they are actually released, and there's no sane way that you are going to be able to maintain hype all of the way through like you can do with a 1 month pre-order. Instead your goal should be to be hyped with the kickstarter, let it die down (unless you are helping to contribute to the game design, which is always fun), and then get hyped again when it actually gets released and you get a chance to play it.