All science is is theories. The theory of relativity, the theory of evolution, the theory of gravity, etc. While we observe these things we do not have definite proof. We know that gravity exists, but most scientists really dont understand how it works. Its kind of like that with conspiracy theorists. We know that there are secret societies, we just don't know exactly how they carry out everything.
If that made any sense lol. Which it probably didnt haha.