Farming is just the investment part of the job. Unless they're US corn or soy farmers living primarily on subsidies, they still generally have to sell what they grow. The agribusiness side means dealing with the rest of civilization on terms that farmers don't get to set. So do the very non-trivial parts of farming where you have to regularly buy supplies, service equipment, and otherwise deal with employees (yours or others) and their labor regulations.

This description of farming also generally ignores animal husbandry, which outside of factory farms also ties work to the sun regardless of what the clock says, what part of the year it is, or what latitude you're on. When the rest of the world you have to interact with changes their clock, you have to both accommodate the animals' lack of understanding and desire for routine and adjust your own work around it. Dairy farmers aren't putting lighting in cow barns for fun or aesthetics, they're manipulating day/night schedules to get cows on the times that commerce relies on.