Some people have a lot of problems dealing with peer pressure, and are willing to make promises because they think that's what people expect of them, not necessarily because they're convinced they can actually deliver.
Sure, they could have chosen not to make those promises, but you have to put it into context.
I think Kickstarter is an awesome website and I really hope they don't get any ill will towards them due to the possible failure of Diaspora.
My own take: wake me when they've shipped real, working software I can actually use to replace Facebook while controlling my own data's access rights and durability. Until then, this is still pretty much another case of a few guys making a piece of software somewhere, that may or may not ship, that may or may not succeed, and they started only a month ago. Yawn.
http://video.google.com/videoplay?docid=2255807183978932387#
But I'll say three serious things:
1) Yes, of course nearly everybody in the world is worse off than these guys.
2) No, such facts do nothing to cheer anybody up, however factual they may be:
http://www.poemhunter.com/poem/richard-cory/
3) Empathy is not a zero-sum game, in which giving it to one person implies that you must withhold it from another. Rather, empathy is like a muscle: If you work it, it gets stronger. The opposite is also true: If one makes a habit of sneering at the pain of the rich, one may soon find oneself sneering at the pain of the poor as well. Practice makes perfect.
http://stuffwhitepeoplelike.com/
And, yes, that is what it means. I guess http://stufftheuppermiddleclasslikes.com didn't test as well.
Still, I suspect that Kickstarter will suffer more than the Diaspora guys if Diaspora fails.