Or maybe they were trying to make edible wine.
I think about things like this sometimes as I consider how rapidly we are moving further and further away from basic survival skills and even from doing anything for ourselves with our own hands. We even buy salad in bags. I wonder what would happen if some natural or apocalyptic disaster threw the survivors back on their own resources. Most citizens of the modern world wouldn’t have the beginning of a clue how to build a shelter or identify edible plants. If we wanted to reinvent bread, what would we do?
People in primitive societies would suddenly be gods. They would own the technologies most needed for survival. That notion has a screenplay in it.
I’m also curious about the fact that the same or similar processes for numerous things seem to have evolved in different cultures in different parts of the world. It has to be more a matter of logic and experimentation than chance, don’t you think?