I actually was thinking about the impressive extinct sea-critter “livyatan melvillei” when I formulated the question. I know that they were true macro-predators and needed the bite-force. I’ve heard that modern sperm whales tend to rely on suction to ingest the cephalopods that they consume. I just figured that some of the prodigious bite-force might have been retained, since it might be useful in fending off male rivals, or the occasional pesky whaling boat.