It's just about making simplifications where possible. You don't need a molecular dynamics simulation to predict where a pool ball will go. That simplification

It's just about making simplifications where possible. You don't need a molecular dynamics simulation to predict where a pool ball will go. That simplification is easy to see and understand. Scientists and engineers have been making useful simplifications for a long time. There are other simplifications where a bunch of forces and masses can be cancelled out, or aggregated - but we can't see them. Can a computer see them with enough processing? It seems like it.