A point that is brought up often about vegetarian diets is that they are best suited for those living highly meditative/low sensory stimulation lives. That if you are living in a city/high-stress environment than a meat diet is necessary as it provides quicker nutrition.
I'd say the contrary: the amount of stress exposure requires more of an intake of greens, roots and cleansing vegetables that are free from the chemical byproducts of meat manufacturing. The ability to cleanse environmental pollutants, "heat" generated from social stressors and living and the nourishing qualities of plants are more important. Meat intake should be limited and not the primary source of our health protection. Also, the energetics of meat are marked by stress through the processes of killing. If we, as traditional medicine practitioners, claim there is an energetic marker that will affect a person's emotional state...then it would follow that eating animals will encourage a person's to express a state similar to the qualities of that animal. The author in the article below gives some examples- the nervousness of rabbits, the desirousness of pigs, etc. These are fairly common associations of traits to animals based on their behavior. Similar to the use of herbs and other foods we associate qualities with the seasons and growth behaviors and a correlation to the body. How far do we truly enact the principle of macro-micro cosmic mirroring in the body/psyche that is so central to the practice of holistic health?