you have to remember that the old RPGs that had DiD were made for it. the glitchy, horribly balanced nature of skyrim means that you are far more likely to die for stupid reasons rather than from a genuine failure on your part. if it wasnt a trap, it would have been a falmer shadowcaster 30 levels above you or an immovable NPC blocking your escape from said shadowcaster.
were this a real DiD RPG, you would have made a saving throw to determine if the trap hit you. if you died, it was because you had crappy agility and never really specialized in defending against that sort of surprise attack. but this is skyrim, and the only thing that can save you from a trap is foreknowledge and/or physical movement.