Also, of tangential interest on that same page Kickstarter states that the number of successfully funded projects is 'a little less than half'.
Agree. No question there is something to be learned from projects that have failed by reverse engineering or seeing and analyzing patterns of what didn't work.
This is a problem also with the business press. Sure, you hear about spectacular failures (if it bleeds it leads as they say in the news business) but you don't hear about less than spectacular failures and therefore you can't learn from the mistakes of others.
The raw numbers of success and failures are helpful, but I'd additionally like to dig into the specifics.
Second, if that is the thesis, it's silly. We learn more from success than from failure http://web.mit.edu/newsoffice/2009/successes-0729.html; http://hbr.org/2010/01/success-gets-into-your-head-and-chang.... And you can see all the successful projects you want.
This might very well be true, however, if failed tactics/strategies are obscured it is possible that said tactics/strategies will continue to be employed.
Furthermore, even if we do learn more from success than failure, both are necessary lessons for individual success.