Everything being possibly automated doesn't mean everything will be automated. There is always value in human work, even if we are objectively worse at working than robots and AI.
Are You sure that in this kind of world cofee shops with real people waiting tables and baristas making cofee would still exist? Because I am not sure that badly paid people are the essential part of Starbucks experience.
Your scenario could work with McDonald's, where people go for the cheap convenient food. But the fact that Starbucks exists along with good butchers, grocers, and fancy independent coffee shops is proof that the human factor will always be a crucial part of food shopping.