I don't carry emergency food because I am afraid I'm not going to survive, I carry it for comfort and to help someone else.
First possible situation: You're driving in the winter at night. It's snowing when a deer appears in the road and you're forced to swerve to avoid it. You leave the roadway and hit a tree below the grade of the road.
You grab a flashlight and get out to look around the car for possible hazzards. Finding none, you return to the car and use your cell-phone to call for a tow. They tell you it will be a while due to the weather and equipment availability, but hang tight. strip off the wet clothes (from being out in the snow) and pull on the spare dry clothes, then grab a granola bar for some energy and to help pass the time more easily. If you decide to wait over-night for someone to come get you, the food in your stomach will help you sleep.
Second possible situation: You come upon a car accident, after attending to immediate needs and hazzards, someone is physically ok but really shaken up. Giving them something to eat helps them focus on something and calm their nerves.
Third situation: An evacuation order goes out due to immediate threat. You have a 3-4 day "Bug Out Bag" already packed plus 3-days worth of comfortable supplies already in the car (because it's always there) in 10-minutes, you're ready for 7-days and ahead of the massive traffic jam.