An 80s action hero can die?!High level PCs in my view are Captain America or an 80s action hero. Stronger, more capable, able to survive things normal people could not. But when fighting giants they're dodging or deflecting blows while trying to cut Achilles tendons or aiming for the major artery that runs down the leg. They're really good at their job.
But they aren't superman. They're still relatable, they can still die.