Same goes for cooking your own food, doing your own laundry and picking your own clothes. Efficiency has its place in times of scarcity, but there is a cultural component on top. Part is education, part is carrying and renewing traditions, part is the ikea effect, sure.

These robots will not help avoid famine, but they will help rich first world people be more cognizant of food and agriculture. Which in turn will help them make better choices with the food they buy. This can only work against calory-dense inudstrial food, which arguably is the larger problem than efficiency in large parts of the world.