That's not even a devil's advocate, many other animals clearly have consciousness, at least if we're not solipsistic. There have been many very dangerous precedents in medicine where people have been declared "brain dead" only to awake and remember.
Since consciousness is closely linked to being a moral patient, it is all the more important to err on the side of caution when denying qualia to other beings.
Since consciousness is closely linked to being a moral patient, it is all the more important to err on the side of caution when denying qualia to other beings.