Oh I know. I think that these directors that use fast moving zombies don't fully understand why zombies are scary. Zombies represent plague, or social conformity, or any number of heavy, rational, fears. What makes them scary isn't their speed or intelligence, it's the numbers and the fact that they are so low key that a stray one could get you in your sleep. They are a realization that you are the minority and nothing, nothing you can do is going to change that. To defeat them utterly is to wipe all the sand on a beach away with a broom without getting sand on your shoes.
Romero got this. In his films there are always scenes with one or two zombies, and they are pathetic.... even in hoards they are manageable... and then you relax, a lone zombie ignorantly walks though a hole in the fence and slowly but surely your whole group is zombie chow not due to that lone zombie (who usually only gets one guy), but due to the idiot people. The guy who is infected but is so selfish that they don't tell anybody. The crazy lady, who after seeing so much death feels hopeless and tries to make a run for it, dooming the rest via opening the gate...ect.... Good zombie films aren't about zombies.
For fast movers, the fear just isn't there, at least not a legitimate, dreadful, fear. Even in huge numbers like in this film... if a bunch of zombies are running towards you.. well first thing you'll hear them a mile away and secondly if they are running "this way" well I'm gonna go "that way" and just stay away from them. Even if they catch me it's over so quick that there's really no time to get scared. Quick zombies are a gunshot to the head, killing you instantly and painlessly... real zombies are a gunshot wound to the stomach... you'll be awake and in pain for a long time as you slowly die.