NFL

If you call things tighter, players will adjust. If there are rules that players can't adjust to, then the rules need to adjust. For example, people like to talk about offensive holding going on for every play, but the NFL's rulebook has a list of exceptions that aren't holding that actually make it so that even if you called it strict, there's a lot of plays where there wouldn't be holding called, because it's not against the rules.

You'd have a real game because players and rules makers would adjust. That sounds a hell of a lot better than "Break the rules some, and we'll call it sometimes, possibly at times when it fucks you over, good luck!" Or the alternative, "When it matters, people can break the rules and screw you over, because we won't call it during high impact plays at the end." We see both now.