Derid, instead of ideological trolling, address below:

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Humans are not neutral, unbiased or even always acting in owns best self-interest. Evolution dragged in a lot of baggage, as such your fundamental assumption of rational self-interested player is flawed. Combine this with flawed assumption of perfect information and you "free market" palace is built on sand.

Now to corn sugar example. Humans are hard-wired to prefer sweetness. Sweeter is universally valued as better. High fructose corn sweetener taste less sweet than alternatives, as such it takes significantly more calories to get to the same sweetness level. Is this the fault of corn sweetener producer? No, blame is so distributed between all players that it is easy to make individual case of innocence.

Still, you have a systemic problem where people get trained to eat sweet things and then pumped with sugar until our healthcare system collapses from treating diabetes and obesity.

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