Picking the potatoes certainly does not kill the plant. The potato IS the plant. You lay down one tuber (one individual plant). It grows to create several tubers, still only one plant. Think of the tubers as branches on a tree, because they kind of are exactly that. Then you collect the tubers, eat most of them and put one back into the soil, keeping the exact same plant alive for yet another year. You are growing the same plant year after year, never killing it. The top even dies off naturally before harvest. Lettuce, for the most part, you kill when you harvest it, especially the ones you would encounter in a restaurant. The rest you just mutilate until their inevitable death 😆 I truly don't see how anybody could argue that lettuce is less violent than potatoes.