For every success, there's 100s and more failures, scams, and unfulfilled promises. Developers should seek traditional funding if they're so confident in their idea. If I'm taking a financial risk on a developer, I should get a financial return if it succeeds. "Kickstarting" is a fancy way of saying "lets socialize losses and privatize profits".
I've only crowdfunded a handful of gsmes, mostly vr. Because they can't get traditional funding. Despite this I want to support projects that could be interesting. Without Kickstarter these projects would not exist, rather than switch to traditional funding.
I know there's risk, i know they may never get finished. But its worth the risk in case a true gaming gem comes out.