Both my farm and non-farm businesses have a physical product, though. In fact, in both cases the product is food, as it happens. I expect the farm business is less "icky" because it is entirely dehumanized. You don't set the price, you don't have to win over customers, and increasingly with more and more automation you don't even interact with the customer at all. There is no "Poor service. 0 stars." or "Too expensive! Scam." to contend with.
There’s a certain satisfaction there that most people don’t get out of their ‘cog somewhere in the middle of a machine’ jobs.