Yes, sort of. But there is a lot of reason to trust science there: We never really understood until a Century ago, how birds can fly. Now we can even explain bumblebees.
Birds and bees are well studied, with studies repeated over and over, with variations of planes flying in different ways. Also... birds do fly. That observation is solid.
I'm not convinced that EM drive even works, let alone what the theory behind it is. The observations behind EM drive are still inconsistent, with not even a clear relation between power and thrust. Imagine taking a wing and not getting the F = k * v^2 law out of it.