I'm kidding, really, one play doesn't make a player, regardless of it's impact. If Ted Williams dropped a easy fly ball that would have got the Red Sox into the World Series had he caught it, he'd still be the best hitter in the history of baseball, he could do that 20 years in a row and he'd be the best hitter in baseball history.
Hell, Brett Favre is the King of throwing interceptions in the worst possible scenarios. How do you think someone with that kind of talent, with those monster stats only produced one super bowl ring? You could make a very strong case that he's the best QB of all time, could you not?
I agree, bad moments and choking do not make you any less of a player, especially in this case. I think it's a great idea.