People can grow vegetables and simply eat. But bread is way too complicated.
There is a bakers’ dozen of big steps to go from wheat into bread. And multiple special structures needed too.
Same with beer. Wine makes total sense but how do you even invent ale? How are these common foods everyone knows and uses?
I was thinking “imagine if mediveal people knew how to boil seawater and sell salt” and now I spent 20 extra minutes in the shower.
It’s also because salt is heavy as fuck, so transporting it from coasts and places with salt mines was expensive.
As expensive as any other good weighing the same. They would have transported it mainly on ships, where weight wasn’t really a problem. Salt wasn’t particularly expensive, that is my point. You seem to be suggesting the opposite, ignoring basically everything I just wrote in my comment.