That's entirely wrong. The interactions of proteins and amino acids and ions IS, at a fundamental level, the evaluation of physics over time.

I'm not saying it isn't physics, I'm saying it doesn't know what the physics is.

We're physics too, but we don't know how it all fits together.

If a sub-part of us that knows less than we do can make a copy of us, despite not knowing how it all works, that's an existence proof that we don't need to understand how it all works to make a copy of us.