>> Yes the waiter cooked the food, cleaned the dishes, bussed the dishes, seated the table(politely!), and so on. They did the work.
They may have done the work, but are mostly not paid the money. Wait staff are unqualified and generally paid dirt in expectation that they will receive tips from customers. Kitchen staff are certified/licensed in their trade, paid something more than nothing, and are not expected to earn tips. That is the current reality. A customer trying to force a new reality by not paying cash tips to wait staff will not be appreciated.
They may have done the work, but are mostly not paid the money. Wait staff are unqualified and generally paid dirt in expectation that they will receive tips from customers. Kitchen staff are certified/licensed in their trade, paid something more than nothing, and are not expected to earn tips. That is the current reality. A customer trying to force a new reality by not paying cash tips to wait staff will not be appreciated.