Originally Posted by Bob Ross

Put your stationary bike on a Zwift route. Turn the pedals until Zwift extrapolates that you've gone 1 mile. Look around; you're still in your living room. You haven't gone anywhere, you haven't covered any distance. You've gone zero miles. Zwift has deluded you if you believe otherwise.

This isn't rocket science: No one is denying that you've gotten a workout on your stationary bike. No one is claiming that you didn't derive some benefit from sitting on the trainer for however many hours you did. But you didn't go anywhere, didn't cover any distance, you remained in one spot for the entire duration of your Zwift session. And so "miles" is not the correct metric to measure whatever it is you're logging from that session.