You know what would a bankster do when he finds out there is something seriously wrong with their new transaction system? He will try to hide it, he will try to do everything to make sure this information doesn't get outside, he doesn't want his stock price to drop, he doesn't want his investors to lose their confidence. But you can't always stop the information/rumors from spreading, your investors will somehow get to find out a bit about it here and there, this gives them uncertainty, and their greatest hatred is uncertainty.
Now let's face it, the investors are not idiots, no one is an idiot. We all know very well there never was and never will be a error-free system in the world, and a crisis is doomed to strike you sometime, the important thing is how the people behind the system handle it. and in the bitcoin world, the bug itself and the way people handle it is clearly visible, everything is transparent, everything is there for everyone to see, investors will get no uncertainty, they can figure out exactly how much their risk is in such a situation(which is not big, by the way), if they are willing to take things into their own hands and not succumb to panic. They will like a system like that, and a system like that will prevail in the end.
That's a bit optimistic of you. However, this is what an investor would like (if they bothered to understand it): even after just about the worst thing that could happen dud happen, the whole issue was resolved in a matter of hours, with no significant loss. Try that with any other currency, commodity or processing system!
OK, but rhetorics aside, if we really believe in an open transparent system is what we want in the end, we should learn to deal with things like that as they are inevitable, or let's all just hide in the grand nanny's basement forever. 