Part of it is the courtside experience is a core part of basketball both for the image but also for a very important set of clientele. Also, since Allen Iverson, the NBA has worked very hard to sanitize their image and shy away from “street ball.”
The refs can take it, but it’s very much against the rules.
That’s commenting more on the attitude and cursing than questioning calls. The latter is probably due to delay of game being a very real threat in Basketball where in football most of the game time the ball is not in play.
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