Not because it would be correct. Rather because it could potentially identify high probability situations we haven't thought of.
What are the best projects of the kind that you're aware of? Does anyone know how this is done at the Federal Reserve?
I'm not sure if you're right that such a simulator would be valuable. The thing is that we already can explain quite well what's happening and have the means to fix stuff, but frequently there's no political will to do so.
The closest to what you are looking for that I know of is this: https://github.com/crisis-economics/CRISIS.