I don't take whey protein because isn't superior to whole food. Throws a little wrench into your argument. I also consume large amounts of vegetables, but see no need to rattle it off here as you did.
Additionally, a greens or Superfood supplement can provide a much wider array of foods than what you can buy at the store.
Either way, if you don't care to take a supplement, than don't. There are definitely benefits though for those that are interested.