Looks like someone doesn't own a home or have a family.
Or if you do, perhaps you have adequate savings where that's maybe not a big deal. Or maybe your spouse makes good money also to support for a while. But most people are not lucky enough to be in that situation.
If I live in New York, as Kickstarter is located, what is so difficult about changing jobs if I have a family? Same thing with other tech hubs, you don't need to physically move homes in order to change jobs. What is so hard about it?
Even if you have to move, my family moved 10 or so times in a few years when I was in grade school for new jobs, never seemed to be a huge issue.