This seems more of a personal thing than a game thing. At most make a difficult option that cuts down on saves. But really, for some people this will ruin the feel of the game for themselves and for other people it won't.
I understand temptation to do such things even when you know it'll ruin your experience so I can see why some people would want to turn the option off for themselves. But at the same time, having to redo a long sequence from the beginning for some people can just add to feelings of frustration and ruin the game for them. So getting rid of it entirely is going to ruin things for some people and keeping it will annoy others...so best option is to make it an option.
