Preparing and cooking meat is waaaaay easier than cooking and preparing vegetables

Also it might be cheaper as well.

For example, it is insanely easy to prep beef ribs to be cooked in the oven. All you have to do is add some old bay seasoning, garlic powder, and random Italian seasoning lined the cooking tray with aluminum foil, set the oven to 350°F, and just throw it in the oven for an hour or two.

Consider how much easier this is in the drudgery of chopping up vegetables, making salads, etc.

Also in terms of price, you can get a huge rack of beef ribs at Costco business center for only about 10 bucks. Even for myself, I could barely eat more than one rack. I can feed myself for a king for only about 10 bucks.