At the end of the day, red meat is bad for you. Processed red meat is in the same category as carcinogen as Alcohol and Tobacco. To put into perspective, diet coke is two categories lower. And it doesn't get much more artificial than that. Bacon is basically cigarettes in meat form, and hamburgers are just heart disease in a bun.
Believe it or not, starches and oils are genuinely healthier than meat. Meat is basically just bad for you, or at least most of it.
And before I hear more "dawn of man" stuff - uh, no. For most of human history, humans ate very little meat. It was mostly plants.
And, of the meat they did eat, it was nothing like the meat we have today. We eat extremely fatty farmed meat, they ate lean game meat. Farmed meat is a very new invention.
There is still lean meat today! Hamburgers are not it, though.