People absolutely crave/enjoy foods they "need" when they need them, even if they're otherwise disgusting. Years ago (before such studies would be frowned upon), researchers let infants in the hospital choose their own foods, to see if, when left to their own devices, they'd eat a balanced diet. While there was probably a lot more cookie-eating than necessary, kids who had serious deficiencies invariably made up for them. All the children with iron deficiencies, for example, chose to consume cod liver oil, which is disgusting--but it was necessary at the time.
For the dehydrated, then, Gatorate is pretty much like cod liver oil. Delicious when your body needs it; nasty when it doesn't.