Without the cook, you won't have food. Without the waitresses, the food would remain in the kitchens. And without YOU, there would be no use for the chef to prepare food. But that makes no one more or less important to the occasion. The elementary courtesy when enjoying a traditional kaiseki meal is to show consideration for the other people part of this occasion. Be thoughtful of ways to make it easy for them to do their job. In the end, the better they can do their job, the more you get to enjoy your evening.
Learn Japanese Tea Ceremony Etiquette from a Tea Master. A Tea Master explains the 5 Things you should know, before attending a traditional tea ceremony.