To add to the (completely correct) comments about those foods being engineered to taste good, humans evolved to crave fat, sugar and salt because for almost all of history, getting enough of those to grow up and have children was very difficult. People with that extra incentive to obtain and eat as much of those as possible were more likely to pass on their genes. Only in the last few generations have we had so much access to them that most people have to actively resist their instinct to eat so much it’s bad for them.
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