i hope you're joking. Many Worlds to treat the alleged indeterminisity is like cutting the head off to treat an acne.
This is simply just bad explanation of perfectly reasonable math. This happens all the time with fundamental physics. Unfortunately the bad explanations persist, because coming up with good nuanced metaphors is hard, and they tend to be harder to communicate.
Many worlds is by far the best hypothesis to date.
I don't agree that those interpretations are inferior to MWI. In particular those theories postulate that the world is essentially probabilistic, and so do not have MWI's trouble with predicting probabilities.
well, to me it actually works in the opposite direction, like prove by contradiction - if the Many Worlds is the best/logical/natural consequence of the indeterministic view of QM than the indeterministic view is definitely have to be overturned.
All the Bell experiments i read about so far have obvious gaps allowing for obvious explanations. And if you take the latest one, the heralded loop-free, then there is obvious question - why didn't they published the statistics of the unconnected, non-entangled runs? I mean it is obvious from current QM orthodoxy that non-entangled runs wouldn't produce S>2, yet from alternative, locally-realistic, experiment result explanations the S>2 would be produced in that case too (the S>2 isn't possible in the locally realistic world, yet it is possible to locally realistically explain S>2 in all the Bell experiments that so far i've seen)
If you're interested other reasons the MWI is often considered "nice" is that it is: linear, local, causal, realist, entirely unitary and in some sense (this is often disputed) minimal. Other interpretations have to add mechanisms (for example wavefunction collapse) in a rather ad-hoc way in order to stop many worlds happening.
I disagree that Einstein's intuition carried him through quantum mechanics. I rather think that history shows him to be probably on the wrong side of the EPR/Copenhagen split. Not only did he cling to determinism (and I think he would have believed in something stronger than MW, which is a sort of very-weak determinism) but he also constantly objected to "spooky action at a distance" aka quantum entanglement which has now been very well observed.
Einstein's objection to spooky action at a distance and clinging to determinism is exactly the kind of thing to point to when trying to explain his amazingly good intuition for the character of physical law. He was 100% right about the action at a distance not being real and physics being deterministic. To be clear, entanglement is real, but there's no effect that happens at faster than lightspeed; the resolution to this is, of course, MWI.
As for what use there is - the primary use is that we can all stop being confused about this. And stop thinking that just because quantum physics is mysterious, it must necessarily be connected to other concepts that are mysterious too, like consciousness. And when else would we question the justification for learning the truth of what we all and the universe are made of?
(P.S. In what sense do you believe that MWI is very-weak determinism? It's deterministic through and through.)
The deterministic solution to quantum mechanics is Pilot Wave theory. It can explain nearly all quantum weirdness. Spacetime vibrates.