I’d suggest the “off” function on AirPods is used by… almost no one reasonable. I don’t know why an audiophile would use it, honestly. It sounds measurably worse than turning on ANC or Transparency. The only use is if you truly truly need the extra battery life. If ANC bothers your ears, the much cheaper regular AirPods should be your buy… or any number of cheaper non-ANC buds.