We don't like it because it can make no actual predictions about the physical world if it doesn't include measurements. And when you include them it's no longer that simple.
You can make predictions if you assume that you are in (weighted) randomly selected world.
Well rather than a single world, I think that the perceived identity exists in multiple highly similar and interacting worlds seen as an entity. Just like we have a size in physical space we also have a non-zero "size" in probability "space".
Well rather than a single world, I think that the perceived identity exists in multiple highly similar and interacting worlds seen as an entity. Just like we have a size in physical space we also have a non-zero "size" in probability "space".