As an American, I agree with you 100%. Our opinions on taste are utterly worthless.
It's not just Hershey's chocolate either (which is already bad enough), it's so many other foods that are commonplace here. Food quality in this country is abysmal. You can get great food here, but it's harder to find and you'll pay dearly for it, but the stuff that regular Americans eat is generally awful.
Hershey's chocolate breaks that rule and contains butryic acid. Here's a link explaining why and how that affects the taste: https://www.chemistryworld.com/podcasts/butyric-acid/1017662...
EDIT: To be fair I think the butryric acid thing can be overlooked as an acquired taste. Same way that IRN BRU tastes like bubblegum to Americans, even though UK'ers claim it isn't. I still think Hershey's regular milk chocolate works better with peanut butter than any other chocolate I've had. The bigger issues I have with Hershey are the cloying amounts of sugar they keep adding as they knock down the cocoa butter and cacao solids in each of their products to save money. I used to run boxes of UK KitKats down from Canada's duty free stores so that other Americans could see what they were missing out on.
You can add American's functional properties to almost any cheese with sodium citrate powder (we make and slice up baking sheets worth of "Americanized" aged cheddars, gruyere, and even blue).
I would not confuse these useful properties with goodness. Grapeseed oil is also extremely useful. But California olive oil is a better oil. American cheese is like the grapeseed of cheese.
On the face of it "chlorinated chicken" sounds unappealing, but I've been to America multiple times over the years, eaten all sorts of food (including chicken) and never noticed any difference or ill effects.
Like most people here, I get to choose what food I eat. I could eat organic, ethically sourced meat every day if I chose to. However, if chlorinated chicken let's people on a lower income eat better than before, I'm all for it.