Remember that simulation of covid from UK with all the pomp and bravado? Not even close to reality.
By the way, all simulations have the same relationship to reality as cartoons. This is just philosophy 101.
Basing your decisions on complicated scientific methods inspires confidence in many people, even when there is no benefit.
It also mitigates responsibility for decision makers, because they can claim that they would have made the perfect decision if only the model's predictions would have been perfect as well.
On the contrary. When you fully understand something, there's no longer a need for a model.