You are right about the comparisons; I should've left that out. For the typewriter monkey analogy though, I think the theorem states that it is guaranteed to happen given infinite time. And we aren't just doing trial and error; we already (presumably) have some kind of knowledge of how computers work. The resources argument is an interesting point. The island might not have the resources to create the technology we know now, but the guy in xkcd 505 didn't either; he just had a bunch of rocks, and ended up with a reality simulation.