If you believe it lacks those traits but is conscious, you believe in a definition of consciousness that is meaningless, as “human-like” is the only reference against which we can measure consciousness. A good thought experiment is to try and imagine a consciousness that is radically different from humans, and whether we would be same to even register it as “consciousness” at all. (Incidentally, pretty much all portrayals of aliens in sci-fi give them a human-like consciousness, just with varying degrees of twist on top of it to make it feel engaging.)