>>17870328sugar in itself isn't bad for you, but the amount of sugar you get in a soda is much more than you could possibly naturally get. The few ways humans were able to get sugar before was to eat fruit, which is hard to come by in nature because other animals are better at getting to the fruit before us.
pic related. To get the sugar that's in a 1 liter bottle of soda you'd need to chew through 1kg of sugarcane