Cookie is a Monster. He is supposed to represent unbridled obsession. It is the job of the humans and other puppets to reign him in. If he has self-control, then he is no longer a monster. Now children will be taught that it is Monsterous to have disciple. Wrong wrong wrong.
If your kid is shoveling cookies into his face by the bagful, it’s not Cookie Monster’s fault. Conversely, watching Cookie Monster eating an apple or bunch of grapes isn’t going to get your kid to stop the shoveling, either.
It’s like they say on the cheesy drug commercials. THEY LEARNED IT FROM YOU.