EACTLY!!Then don't do it? If you don't like playing that way then don't. The mere existence of that system does not compel you to use it. If you can't resist the urge then I don't know what to tell you.
A similar situation are the presence of cheat codes/console commands. The existence of them is something some people like to mess with but you don't have to use them.
The best system is to have both. Autosaves/checkpoints and the ability to save whenever. When I know there is an autosave/checkpoint system I rarely manually save except when exiting the game but if I am having issues somewhere I can cut out the retry time by saving closer to the problem.
Look you can argue the pros and cons back and forth all day, what it boils down to is user preference and some people like myself simply feel that quicksaves are better and necessary to get the most enjoyment from the game, based on our own playstyle and preferences.
Put both in, let the user pick which they want, if you can't stop yourself from using quicksave when it's present...then I'm with CountZero, I don't know what to tell you, maybe you need your head checked?