With respect to the why are were here versus there question it basically comes down to the fact that we are where we are and we are not where we are not.
Now if you wish to postulate that there are an infinite number of "you" that is philosophical mumbo jumbo because you^1 thorugh you^n are not in contact with each other by any means known or theoretical.
In fact before you could even postulate that the different you's were "you" you would need to define exactly what "you" is (or is it are?).
With respect to simplicity versus complexity as things become more fundamental ... I would suggest that consideration be given to the fact that so far as I know no part of physics can not be correlated with information theory. And I have no reason to believe that the entire universe, as we see it, can not be constructed from zeros and ones. Remember fractals create infinite complexity in finite space. The complexity to which you refer may only be obfuscation. The complexity of all of chemistry comes down to just a handful of very simple statements of fact.
