Don't they have weight rooms at Tennessee? Using that same logic we should have just put Otah on Jenny Craig. Problem solved.
It has to do with adult development, otherwise you'd see high school football players jump straight into the pros. A 19 or 20 year on a strict weight lifting regimen for 2 or 3 years is not going to be as strong as a 24 year old who's been on a strong weight lifting regimen for 7 or 8 years. Have you ever lifted before? Do you know anything about male physiological development?