I'm not sure what you're trying to say, please correct me if I'm wrong...
If only Mac App Store was perfect, everybody would voluntarily do the right thing? No developer would ever again offer downloads from its own web site in order to pocket an extra 30%, nobody would ever release infected downloads out into the wild, nobody would ever again click a Download button at a web site? If OS X security was nailed down as tightly as iOS, nobody would ever develop or use a jailbreak? That Apple would be able to guarantee that no App Store developer would ever release faulty or malicious code?
I'm sure that, if there is an infinite number of parallel universes, there will be at least one where that will be true. However, it isn't this one. As far as I know, it's not possible to communicate between parallel universes (well, at least if you're living in this particular universe), so you're not living in an alternate universe where perfection is possible.