x-post Rerevisionist...
We will eat. To live, naturally...it is akin to being addicted to breathing.
However, what we eat is a rather manipulative realm, isn't it?
I believe the food stuffs that come with the lables of hugely complex ingredients is a bow to "truth in advertising" for the chemicals that enhance shelf life which is more important to the industry than whether or not these additives are healthy. But the common consumer is not going to know what the super-syllable ingredients actually are, or what they specifically 'do': enhance shelf life-are we to blindly believe it?
Therefor, why would it be a leap of imagination to believe that if a chemical can make a product last longer, what is to say a chemical additive could not help us choose these products-coming back for more-a la MSG? What scientific name does MSG travel under these days? I don't know. But I would believe that the name would be changed before the use would be curtailed.
So no, natural foods, such as fresh potatoes as you suggest, would not be addictive or included in this theory; but "processed" potato chips certainly would be.