That in my opinion is backwards, it should be your team that feels the effects of the defense you are playing and not the other.
So your saying that pressing a team shouldn't make the offense trying to break the press tired? It definetly does in real basketball. While it should affect the defense just as much it still affects the offense. Same with zone. The game is a lot less tiring when you can pass around the perimiter without having to V cut to get open like you do when the other team plays tight man.