You are ignoring the fact that beings learn and evolve. Would you 'enforce' a baby not to throw up food on the carpet?
yes, everyone would 'enforce' that baby in the sense that everyone will interfere in such a way that the baby does not throw up on the carpet. We enforce our values on the natural behavior of the baby.
If you want to enforce a creature not to eat because you do not understand how their diet fits into some longer term picture, then you are taking food from a stranger, a hostile act that can merit death in nature.
in the case of the chimp we were talking about killing someone for food that was not necessary for survival. If it was necessary for survival, to avoid death, then we have to use the ring finger which says that the animal is allowed to eat whatever is necessary for survival. Then we have the situation of the lion eating the zebra.
If you want to try to be more civilized and try to convince the monkey not to kill for food, my suggestion would be first to master that skill in your own life, then in the lives of those who share your language and would not need 'enforcement' to agree with you, then maybe consider trying to force yourself on monkeys.
that sounds obvious. But it is not merely about convincing someone. We did not convince the baby not to throw up on the carpet. Yet, we interfered in its behavior with the goal that the baby doesn't throw up on the carpet.