You're not wrong, in a perfect officiating world. But in Texas, if I were to threaten to stop a game/match because of a fan (prior to this law) I would most likely be scratched from working any games there in the future.
Is that right? No.
Should officials care about that? Of course not... but they do, because it can impact playoff assignments.
Me personally? I don't care. If it got to that point, I probably don't want to work that school anymore anyways, and tbh if the fans are like that, the players are like that, meaning they're undisciplined and unlikely to win, or if they do, to go far in the playoffs.
It is what it is. We live in an imperfect world. This law was a necessary change, and I don't know a single official who doesn't support it.