Oh I get it now. It's a matter of *cringe* verisimilitude.
Some people demands heaps of it, some people don't care, and some people freak out and leave the movie when a Skorpion starts dropping M16 shell casings...
yea the best part is it cn't even be US VS THEM because there are sooo many layers of intermixed feelings on verisimilitude that it is a million side war...
Player 1: Well I have 132hp and that cliff is only 80ft give or take, that's 8d6... less then those fireballs the death knight threw two of last dungeon, I can jump down no problem...
Player 2: That's meta gaming, a fall from that hight should kill you..
P1: WHY?
later
Players 2: Cool I rolled a nat 20, and maxed my damage... 117pts, I throst my shortsword through the beasts eye..
DM: Ok, on it's turn it bites you
Player 1: Wait, how if that short sword went throught it's eye into it's brain it has to be dead...
later still:
Player 1: I missed the goblin, but I still deal 3hp
DM: Ok, that kills it, it only had 2 left
Player 2: no way, it has to hit to kill it...