I was thinking the same thing. It turns out from further reading that the offending party was a member of the accounting firm and not crew per se; still, a major snafu that boils down to "wrong prop handed to performer." I definitely plan to use it as an example to my interns about the importance of checking over props backstage and staying focused throughout the whole show.
As for the public, I'd focus on the fact that this particular snafu hasn't happened before in the entire 87 year history of the Oscars. It's impressive, honestly, especially given the limited rehearsal time. Reminds me of the conversation I had with my family about the Super Bowl halftime show: there's an army of crew there who rush that field, setup an entertainment venue, run a full-fledged multimedia show, then deconstruct and cleanup, all in a very short amount of time. It has to go like clockwork, and amazingly, it does.
Gaffes happen. But not often. The fact that they're noticeable says something about how well most people do their job.