Martin Luther King Jr. said, “Sweep streets like Michelangelo painted.”
If that doesn’t put an onus on you to do any job thoroughly and well, then finding fulfillment and “reason” in much of anything you do may be constantly sought after and thus a constantly elusive thing.
Working with a spirit of gratitude and a spirit of servitude will provide and produce much deeper reasons for any task at hand.
We evade fulfillment. Fulfillment doesn’t evade us.
I can’t add much else, so I won’t.