It's happening a lot now. There was a famous dairyman in the uk who gave it up and converted to veg farming. He released his herd to a sanctuary. I know personally a lot of farmers hate their lives and would give it up in a shot if they could. They can get grants to help make the transition but it's not well known. Change is one of the hardest things for humans it seems, some would rather suffer than take a step outside their box.