Here's my take on that reasonable reply......
What does full hit points represent? Full health.
What does negative 1 hp represent? Death.
How does your model account for the slope?
It doesn't. Just because you choose to be in denial that the model represents those two extremes doesn't...
Grittier is just another term for fantasy realism similarly to common sense basis vs popular impetus with modern D&D editions to displace realism with a wink and a nod game effects that favor cartoon-ish+video game+fast reward with least time and effort+monty-haul+John wick vs Godzilla+first...