Humans have been using spices for thousands of years. Salt was worth more than gold at one point.  Spices are not the problem. Over consumption of garbage because it's cheap and abundant. Humans are drawn to high calorie food because it powered our brains which needed a lot of calories when we were evolving. Which is why human can process fruit, meat, and other high cali foods, along with lower calorie foods when high calorie is not available. We are basically garbage cans for the powerhouse of our body.