I'm sure I could find a kinder way to phrase this if I cared to try, but don't be fucking retarded.

Saving my game right before I plunge into a room full of enemies with limited cover and even more limited ammo doesn't prevent me from dying once, twice, a hundred times before I develop a winning strategy. It doesn't mean that I win just for showing up. It does mean I get to focus my effort on overcoming the challenge at hand, rather than being forced to replay some arbitrary chunk of the game over and over again just to get to the bit that overwhelmed me. (Why should the penalty for failure be endless tedium? That sounds too much like real life to qualify as entertainment.)