The argument is an appeal to nature. In the context of food, though, this argument has been anything but a fallacy in the past. It's not unreasonable to quest

The argument is an appeal to nature. In the context of food, though, this argument has been anything but a fallacy in the past. It's not unreasonable to question whether a single-source producer of processed food stuffs is safe for everyone when consuming large quantities over a large period of time. Do they know why their bars are making people sick, yet? What more subtle issues (contamination or formulaic deficiency) could be lurking, now, or in the future? It's clearly a risk, even with a lot of engineering know-how, especially this early in the game.