Plenty of animals aren't very intelligent, but we still have ethics standards regarding the treatment of them, because we have the belief that they have the abi

Plenty of animals aren't very intelligent, but we still have ethics standards regarding the treatment of them, because we have the belief that they have the ability to suffer. Note that they do say "Most reinforcement learners in operation today likely do not have significant moral weight, but this could very well change as AI research develops", whatever they mean by 'moral weight'.