We have hands that can call the turn bet that have more outs vs AA than JJ does. T9s has more outs than JJ. So does 87s. Hell even 64s has more equity vs AA than JJ does OTT.
What is the difference between JJ and 64 then? Well if we called 64 and folded JJ then villain would be able to bet 9x for value. But if villain doesn’t bet 9x for value ...then why not fold JJ and continue with our 9x, 8x, 4x hands?