It couldn’t possibly be the loss of calcium and iron from dairy products and eggs, now, could it? Could it???
It couldn’t possibly be the lack of vitamin B-12, found only in animal sources, now, could it?
In the short term, vegetarian diets appear to be healthful. Long term, not so much.
It isn’t that hard to find fortified substitutes in nutritional yeast or soy products but you do have to be smart. Regular meat eating certainly is not the most healthy option either.