Can a vegetarian please explain an inconsistency?

I suppose in some country or another there are really extreem fruitarians who only eat the fruit thats fallen off the trees. fact is we need to eat something, and a lot of fruit and veg are adapted to being eaten by other animals as their seeds get taken away from the mother plant and when you excreate them the seed within the fruit has a new patch of earth and furtiliser. so its just part of one of nature's cycles.