You can’t compare this sort of thing to actual farming though, because that’s not the point of it at all. The point is supplementing from other sources like farms, reducing the need for intensive agriculture, and potentially (with enough people shifting to home gardening) reduce the size of farms needed for veg growing, freeing that space for other things.

It doesn’t have to be as efficient as a big farm to be good for the people consuming it as well as the environment (grass is worthless and veg have to be shipped if not grown locally)

We can’t let perfect be the enemy of good.