David Albert - What Does Quantum Theory Mean?Albert is a physicist-turned-philosopher, and he explains this pretty well.
Quantum theory may be weird—superposition and entanglement of particles that in our normal world would make no sense—but quantum theory is truly how the microworld works. What does all this weirdness mean? How to go from microworld weirdness to macroworld normalcy? Will we ever make sense out of quantum mechanics?
He goes on to say that more and more physicists are adopting the many-worlds interpretation. He says it is counter-intuitive, but does not reject it for that reason. He rejects it because it does not explain the world.
In his opinion, it does not really solve the measurement problem, for two reasons.
(1) it tries to explain the definite outcomes as an illusion. Maybe this position could be justified some day.
(2) it cannot explain the probabilities we see, as many-worlds says all outcomes are determined.
He admits that physicists have done a lot of contortions to try to get around these issues, but they have failed.
"At the end of the day, it does not account for our experience."
I agree with him on these points. Perhaps mathematical physicists will develop a decoherence theory showing that the wave function branching resembles what we see. It hasn't happened yet, but it is possible.
But many-worlds will never explain the probabilities, because the whole point of many-worlds is to reject probabilities. The parallel worlds arise because probabilities are interpreted as world splittings, and all possibilities are realized in inaccessible alternate worlds.
So why are more and more physicists adopting such a wrong theory? No answer given. Physicists are losing their grip on reality.