In this case, yes? Gogurt is full of sugar. Of course the same can be true for yogurt in tubs as well. I feel the straw-manning of Pollan's writing is usually achieved by taking what is meant to be general guidance, pretending it's quite specific and stringent, and then poking logical holes in it.
Generally, the more packaging and marketing that went into something to get you to buy it, the more horseshit you'll find in it too. Generally.
Apparently there's some underlying meaning to "Don’t eat anything your great-great-great grandmother wouldn’t recognize as food." that I'm not understanding. I'm not understanding it because my concept of what my great^3 grandmother would recognize as food, and the understanding of the person who wrote it, are extremely different. Yet the person who wrote it does not explain what he meant by it, and somehow this is my fault?
The past is not a region known for great nutrition. Taking food guidance from it doesn't seem very wise to me. I gather that this phrase is more along the lines of, "think of the idyllic, utopian, imaginary past that certain people believe is what it was actually like, and eat what they would have eaten," but that's not real helpful!