"There lives more faith in honest doubt, believe me, than in half the creeds."
If a person came to me and said they believe in the Multiverse theory and that there are many Universes based on a combination of their study of science, philosophy, and a final leap of faith I can at least discuss this or even entertain this without any other motivations based in reward or punishment.
At the end of the discussion I can either agree based on those factors without it being poisoned with “if you don’t believe in the multiverse you may be tortured in another universe and if you do believe in the multiverse there will be another universe of paradise for you.”
That would corrupt the pursuit of truth regarding the Multiverse theory because now I may have primal fear and desire directly impacting my decision making and thinking. Like Pascal’s wager you may think it is better to believe in the Multiverse because of the carrots and sticks that have been attached to the claim. Threats of violence or promises of paradise are more likely to corrupt the pursuit of truth or abort it than it is to help encourage it in an honest and thoughtful way.
Some religious claims are supported with the carrots of Love, Forgiveness, and Heaven. The opposite of that is to support the faith with the sticks of Judgment, Violence, and Hell.
In the Judeo Monotheistic world the fear of God is the way to wisdom. In the Greco-Roman Polytheistic world it goes straight to the love of wisdom.
I side with the world of Classical Antiquity and Hellenism that the best way to pursue truth is not through the fear of punishment or the desire for reward but through the love of wisdom. Philo - Sophia.