> That's because the "science" on firefighting has already been settled. They know exactly what will happen when you do X to a fire and they know how to stop it fast and efficiently.

That is not quite true. Where science is not available firefighters go by experience and best guesses. The same goes for cops and even doctors.

Not everything we do has good science behind it. Instead, science is coming pretty often much later, simply because actual science takes a lot of time.