When you were little, your parents or grandparents probably gave you chicken soup or some other home remedy to help you get over your cold, probably because their parents or grandparents gave it to them when they were younger.
Before taking whatever they gave you, did you first go to the library and make sure it was actually effective? Did you need to see peer-reviewed medical literature to prove it wasn’t going to have negative side-effects?
Nope. You just took it. Granted, a big reason why you did was because