How does Monte Carlo help mitigation?

I fully agree that all models are wrong.

Their main usage is just replaying the past or encoding the modelers assumptions for the future.

But there is no way to know if a model is good or bad.

There would be if we had infinite universes.

Monte Carlo methods are used to estimate the risk associated with a prediction (and presumably an action taken against that prediction). Does that answer your question? I can elaborate if you like.