My post was to people that believed a fixed number of short rests "wasn't believable". As you said, its fantasy. If you want infinite short rests, sure we can suspend disbelief. But adding in a limit is easy, as that is more like how things work in real life....but it's a fantasy game
The thematics can work either way, so I ask what provides the better mechanic experience. I think very quick 2x per day short rests is the easiest way to balance classes and the game, and is as believable as anything else in the game.