Sure, I used the word 'theory' incorrectly, I should have said 'explanation'. As I understand it, hidden variables are fine if you're happy to throw away local

Sure, I used the word 'theory' incorrectly, I should have said 'explanation'. As I understand it, hidden variables are fine if you're happy to throw away locality, which is exactly what Bohm interpretation does and exactly what we're talking about here. Since your analogy is purportedly showing me how MWI is local, showing me that something that is significantly different (i.e. is a hidden variable explanation) is also local doesn't help a lot.