Neither do you in soccer.
Don't act like I don't have youtube at my disposal and can watch thousands of games, and see that when players are disengaged from the action, they're just standing around or lightly jogging to angle into a formation.
Running isn't the only way to burn calories, and basketball players will jump dozens of times more per game.
We also need to consider relative build here. A jacked, 6'7", 230lb specimen like Kawhi Leonard is under a lot more load playing basketball that a 5'6" 150lb midget like Messi or even the 175lb Ronaldo. More muscle mass=more oxygen demand, so a frame like Kawhi even being able to play 40 minutes of basketball is more impressive of a "stamina" feat than watching this run around for 90 minutes.
