I’ve been learning some about rabies and learned about rabies causing hydrophobia. This is just a theory, I’m not saying I know anything about this topic to be knowledgeable, but if we could get someone with rabies to not fear water, could they survive?
No. You can fix the dehydration relatively easily by just giving the person liquid intravenously.
But the primary way rabies kills you is liquifying your brain, which is independent of how hydrated you are.
Many organs function poorly when liquefied.