I would say that baking the bread is the easy part. Dealing with customers, managing employees, getting to the bakery at 3am EVERY DAY, and dealing with other business bureaucracy is the mentally taxing component.
ps: I am not saying thta being the customer interface is easy. Just not in bakeries and some other kinds. My mother was a post office clerk, it was famous for the angered waiting line venting violently on the powerless employees, sometimes physically. I never had to deal with this in the food serving business.