The only analogy I can think of is another sports one. I used to do track & field. I wasn't the fastest guy running, but I still pushed myself to beat my previous records. I felt a sense of progress/fulfillment when I ran faster than the past.
I think this can exist inside a company as well. It's highly unlikely that people find fulfillment by the mission of a company, but they can find some sense of fulfillment (at least in a work context), by "playing the game their way" and continuously improving.