Maybe you wouldn't get a garden otherwise if you've got no skill, no experience living on a farm. This way you get to have a garden without know how to do it and without a choir part like watering regularly. Now you can water whenever you feel like it.
Observe: "Using the manual controls, you can move FarmBot and operate its tools and peripherals in real-time. Scare birds away while at work, take photos of your veggies, turn the lights on for a night time harvest, or simply impress your friends and neighbors with a quick demo."