Run lots are the key words. I don't want it 100% of the time.
I personally want 3 yards and a cloud of dust smash mouth football. Now get off my damn lawn
In the NFL, the tempo stuff mostly is used to prevent sub packages. Defenses still vary and disguise their coverages. It's actually the mediocre QBs that can't handle the speed of the hurry up in the NFL. It's one of the reasons Chip wanted to move on from Foles. He didn't go fast enough b/c he couldn't process at the LoS fast enough
It's really another case of just giving teams that already have a big advantage at QB a bigger advantage