Something else is bad for us?

I was watching the morning news and caught the tail end of a story about milk. Now, it appears that milk is also bad for us. Researchers are finding that milk contains too much animal fat. It boggles my mind that the more scientists research, the more they find wrong with the foods that we eat and drink. I have concerns that we are causing drastic changes in our foods because of the chemicals that we are adding to the plants and animals that directly produce these foods. Wouldn't it just be easier and safer to just go back to the way things used to be? We don't need to inject animals to create overgrown chickens just so we can have a larger piece of meat on the plate at dinner!