Earlier quoted context omitted.
> You can get someone to write the necessary code for "if funded send to x, else return funds" on any freelance site for a four-digit amount Can you do so in a way that I as a funder don't need to trust you the intermediary?
> Can you do so in a way that I as a funder don't need to trust you the intermediary? No, and you can't with smart contracts either (the intermediary being the creator of the contract), unless funders are restricted to people with the skill to analyze the contract code. As proven by the DAO. And even if you could, you've replaced only a small-and-useless-in-isolation piece of Kickstarter by doing so.
I'm not saying it's the entirety of kickstarter but I think you're being overly dismissive of the concept. It could work well for things like bug or feature bounties, or other similar situations where having a company to sit in the middle and hold cash requires building up too much reputation than it is worth. Running costs become just the transaction & code running costs on whatever network you're using too.