I would say the scientific method really is an invention. Humans don't have wings so we invented airplanes so get places faster.
Likewise humans are fallible, easily fooled or confused by what they think they see, and sometimes they're even intentionally deceptive about what they see. To avoid this we invented the scientific method so anyone can test a theory in an objective way and everyone can be as sure as possible that something is true. If we humans were naturally objective and were always able to know what's true or false we probably wouldn't have needed to create or use this method.
We humans were kind of going in circles trying to understand chemistry and biology because everyone had their own opinions. Once the "experiment" was invented and accepted as a practice to gain objective knowledge, mankind suddenly made incredible leaps in understanding the world.
Science does require faith but not blind faith. You have faith in your car to take you places. You have faith that the food you eat won't make you sick. In the same way, a scientist has faith that if they conduct an experiment repeatedly in the same way, they'll get the same results.