The idea is that meats, vegetables, and fats help you meet your nutritional goals on a fewer amount of calories when compared to carbs- because carbs are empty calories.
You can just as easy have a bad keto diet as you can have a bad high carb diet. Replacing processed carbs with processed meat will not do any good. It's a group 1 carcinogen and will also lead to high cholesterol level causing heart disease.
My point is that carbs aren't the enemy. Neither is fat. Eating unprocessed/low processed food should be the goal.
A minor correction: carbs are not necessarily empty calories. If you consider only sugary soda, then yes. There’s no one verb either. There are simple carbs, complex carbs, etc. The best kind of carbs are from whole foods (not refined where fiber and other nutrients are removed).