Nice use of "green-washing," a term I learned recently. I don't know about these particular cenotes, but people from cruise ships and hotels come to cenotes by the busload, some doing the guided cavern dives, and these "tourist cenotes" get pretty beaten up.Joking aside, I’d have a tough time visiting a site operated this way. Sure feels like a racket with green-washed rationalization for the camera prohibition.
Personally, I don't carry a camera because I have a hard enough time avoiding contact with the environment, but it seems to me that if the cenote operator is willing to allow the average OW diver in there, knowing it's going to result in some amount of damage over time, the incremental damage from allowing those divers to carry cameras is likely to be small.
Did you miss his "joking aside"?How many rec divers have the skill to pass a cavern class?