Nutritional value, "healthiest way to eat", matters to very few people. Most people eat food that is actively bad for them. People eat what's available to them. That means that they can get their hands on it, and can afford it.

Last night, I found a gorgeous piece of sea bass from the Falklands - $18 for 5oz. Pan fried it and split it with my spouse. Why? Because it's available and I can afford it.