WhatGravitas
Explorer
With a hp system, that is only an issue if you're close to 0 hp anyway. Additionally, monsters usually have limited powers - which (in 4E) can refresh on a recharge roll and hit harder, that keeps unpredictability in the game as well.That's true, but maybe the thought is that more of the game is spent in states in which gambling on variable damage is viable, whereas less would be spent in states in which these fixed thresholds matter.
In fact, I think the semblance of predictability is nice, it means a PC can confidently say "I can take it!" - they're well-experienced combatants, though know their own limits... until the dragon unleashes his dragon fire. Oops.
