Well, now I know you're underestimating how big 3^^^3 is (and 5^^^5, too). But let's say somehow you're right, and the probability really is 1/5^^^5. All I have to do is modify the thought experiment so that the planet has 5^^^5 people instead of 3^^^3. There, problem solved.

So, new question: would you prefer that one person be horribly tortured for fifty years without hope or rest, or that 5^^^5 people get dust specks in their eyes?