Well, yeah, the majority of people back then died around the age of 30 because they were out hunting all day and got infections and died from lack of medical care. The average human from that era did not die from red meat consumption. Red meat is the most nutrient dense food you can eat and studies saying otherwise or saying that they increase your body acidity or lead to worse outcomes have been consistently disproven.

My understanding of the average age of a human being 30s-40s is that the average was skewed downwards heavily due to high infant/child mortality rates