Anyone who wants to see this rule through the prism of slowing down the hurry up offenses just because defenses can't handle them is really missing the point. I do not like rules that "ruin" football for the sake of safety. I don't... but what we've seen with these hurry up offenses is not football as intended, it's a gimmick, it's breaking the rules, but doing it so fast that no one notices.
Just watch a given play, and consider what unfolds. False start? Yeah, looking to the sideline. Holding? Yeah, illegal man down field, yeah... and this is brought about by making the refs stumble all over the place and no one actually getting set. The rules were not made with that idea in mind, it was a given that everyone got set, in fact I'd argue it was supposed to be the refs job, they just worry more about stumbling around. Players aren't even allowed to get hurt, the fans boo them now for going down.
Anyway, how am I supposed to say anything that slows that down is bad for the game? It's not. However, the key issue here is safety, and the logic is incontrovertible. A situation, designed for extended periods of time, to prevent defensive players from coming out of the game (and offensive players), even if they want to, even if their coaches want them to, HAS to be, has to be a safety concern. That's all there is so it. If they want out, or their coaches want them out, what kind of idiots demand they have to stay in there?