The only reason for simulating earth and all of its inhabitants and interactions, is to see what would happen if factor X + Y and introduced into the mix and factor Z removed. Or any combination of those.
I bet they will have hundreds of top sociologists and anthropologists on hand to lend their "expertise" to figure what they can or cannot get away with by manipulating the outcomes of this simulation until they get what they want.
What happens when all money is gone?
What happens when all food is removed?
What happens when there is world war 3?
What happens when people revold?
...now what can we do so we're immune to all of this and any blowback?
Sure, they'll release some research paper on how genocides spread, or how animals migrate from one place to another, etc... but having a "toy" like this would prove to be a loss if you really didn't use it to its full use.
If you don't agree with what I say, just keep in mind this is already happening. You don't think governments and people in power have social engineers that crunch numbers and process data to determine all the possible outcomes of something like going to war in Iraq? You think they didn't have 500-page reports on the possible riots that would take place all around the world, the money lost, gained, lives saved, lost, etc.. etc..
Now imagine all those resources pooled into this one tool, do you REALLY think it's going to be used to determine when the next eclipse is going to be or the gas price of hot dogs in 5 years? I think not.