People must be really out of touch with what healthy food is to switch to a meat only diet. Eat plenty of plants and a little bit of meat, just like our ancestors did, and most importantly don't eat too much, it is easy as that. Don't fuck up the planet because you think you can only maintain a healthy weight by eating grass fed burgers all the time. In 20 years we will look back at fad diets like meat-only and keto and make jokes about it.