Seems like you like a philosophical view called “materialism”. It’s not something that can be proven, however, and many (including prominent physicists like Schrödinger and Peierls) would disagree with it.

The idea that a fundamentally completely different entity superficially similar to a human in one respect would somehow have consciousness of a human is valid (even if far-fetched), but the burden of proof and explanation exactly why and how that would be the case is on proponents of that idea—because it’s pretty obvious why it wouldn’t be.