Doesn’t mean we can’t learn from them. The process of developing those models can be incredibly useful in learning about complex steps. They help us understand what conditions and variables are important to look into. We can figure out what we know a lot about and what is still a complete mystery.
Turbulent airflow is an incredibly complicated thing, we still haven’t fully solved the Navier+Stokes equations. I hope to be alive when someone does.
Just because they don’t perfectly figure it out the first time doesn’t mean we should stop putting effort into incremental improvements. Though we do have to be careful that we are not wasting resources when there is a more efficient path forward. Simulations are one of many important tools, we just have to use them wisely.