You’d just swap profit for influence instead. Look at the USSR, they had issues feeding their population, yet the people in power largely got whatever they wanted. See the famous trip Boris Yeltsin took to a Texas grocery store. At least in those days, capitalism handily beat communism in providing a variety of foods to the average person.
I cannot accept your argument since variety of brands for similar product in the store doesn’t mean society can feed itself. It is wrong angle to see on the object. Since there is various of factors which could easily destroy such logic from quality of food to affordability (simple a lot of product in store, but people cannot buy it). Much better metric is satisfying the need, in our case in food. So in our case we should look at calories consumption and nutritional value. Look at cia document where conclusion is “American and Soviet citizens eat about the same amount of food each day but the Soviet diet may be more nutritious”.