We have no reason to believe that the human ability to reason arises from material sources. Maybe ravens are as smart as chimps because reason is not required, in order to be as smart as a chimp.
Findings about smart birds are more of a problem for conventional evolution theory than for human exceptionalism.
Stripped of the rhetoric about supposedly fallen “pillars of human exceptionalism,” the researchers found a neuronal response in carrion crows that “might be a broad marker” for consciousness. Well, sure, it might. But before we get carried away, the consciousness we should know the most about is human consciousness, which remains almost a complete mystery to us, despite much research.