It's kind of like asking, since 3 ounces of red meat supplies all the protein one needs from meat in any given day, why eat more?
As usual, this thread ran tangents whereby we have determined that only 9 ounces of Tiberian gazelle meat is truly enough, but if it's cooked just right, even a 6 ounce monkey steak can suffice.
Which is why at times I prefer the most satisfying feeling of my 458 !