You need sampling at twice the frequency as a minimum to extract a time domain signal into the frequency domain. It says nothing about “perfect” especially when you’re listening in the time domain.

Yes it does. You can use a higher frequency, but that does not change anything except increase the maxiumum frequency possible. Even with perfect ears and the best equipment, there is no audible (and mathematical) difference to be had.

Everyone who claims otherwise should watch Monty’s explainer videos. I know they are quite old at this point, but everything he explains is still perfectly valid. If that does not convince you, nothing will.