So the one who serves your food will also be handling dirty dishes.
You’ll bus your own table
I've worked in restaurants that did not use busboys. More work for the waitresses/waiters, but when all cooperate helping each other out, and the bartenders jump in when needed and not busy it works well enough. The wait staff does not have to give a share of tips to the non-existing busboys, either, so it's a win for them.
No, the waitresses can bus, the food runners handle the food. Ive never understood places who use food runners anyway. Why can’t the waiter or waitress do it? Food runners never know who has what when they come to your table. When I waitressed, back in the day, we did it all, including bussing most of the time and making the salad, plating desserts, etc.