What concrete fact about the physical world do you think you’re missing? What are you ignorant of?
Let’s flip very unfair quantum coin with 1:2^1000000 heads to tails chances (that would require quite an engineering feat to prepare such a quantum state, but it’s theoretically possible). You shouldn’t expect to see heads if the quantum state is prepared correctly, but the post-flip universe (in MWI) contains a branch where you see heads. So, by your logic, you should expect to see both heads and tails even if the state is prepared correctly.
What I do not know is how it all ties together. MWI is wrong? Copying is not equivalent to MWI branching (thanks to the no-cloning theorem, for example)? And so on
Let’s flip very unfair quantum coin with 1:2^1000000 heads to tails chances (that would require quite an engineering feat to prepare such a quantum state, but it’s theoretically possible). You shouldn’t expect to see heads if the quantum state is prepared correctly, but the post-flip universe (in MWI) contains a branch where you see heads. So, by your logic, you should expect to see both heads and tails even if the state is prepared correctly.
What I do not know is how it all ties together. MWI is wrong? Copying is not equivalent to MWI branching (thanks to the no-cloning theorem, for example)? And so on