Doing those menial jobs is what builds us up for the bigger job. If you run a company, you really need to understand and empathize with what your workers are dealing with. You do that by having experienced it for yourself. The current post over at Shot Of Inspiration has a great story of how the author learned the value of doing any job with passion.
My first paying job was a newspaper route. Every morning, I would wake up a 6:00am to deliver papers. I hated it. After a while, I got better at it and learned to almost enjoy the early morning peace. After that job, I moved on to McDonald’s. Another “bad” job but a step up since it was indoors and they gave you free food. Both of these jobs taught me to empathize with the plight of all workers. Every job is important and serves a purpose. By the way, I got the McDonald’s job because I delivered papers to the manager.