Like the other reply says, it's probably just the farmers don't have time or don't want to.
I expect you could make the same comment about just about everything on the planet that is grown or made, but then sold by someone else. The original person could try to sell it to consumers, but that would take so much time and effort they wouldn't have time to grow/make the thing in the first place!
I expect you could make the same comment about just about everything on the planet that is grown or made, but then sold by someone else. The original person could try to sell it to consumers, but that would take so much time and effort they wouldn't have time to grow/make the thing in the first place!