An artificial intelligence might conceivably take over the world and destroy it. Corporations are already doing just that.

An AI might decide that all humans are superfluous. Corporations alone, without automation, need humans, both as employees and as customers. Their directors are human, too. So corporations would not intentionally wipe out humanity. Automation decreases their need for humans but doesn't eliminate it.

Nonetheless, corporations can well decide that most humans are superfluous, and make them die of hunger while living on the street.