I learned that in the old days confectionary trade secrets was a serious business. So this gave rise to the “how do they do this” stuff and of course the author ran with it. It kinda makes sense, way back when you didn’t have tv, not much entertainment, food was basic bread, potatoes, meat, you get these interesting treats and it’s somewhat reasonable price and hey it’s just contributing to your calorie needs anyway. I can see how candy bars were a big deal.