Butch, I would make no such assumption. The overwhelming majority of vegetarians I know eat the way they do for ethical reasons. One can have a nicely varied diet, thank you, without eliminating some of the variety that expresses itself as meat.
I, for one, have no need to hash out which diet - veggie, or not, or whatever - is better. Success has been had by just about any dietary means available, and you should seek out the balance that works right for you. If anyone cares for my personal history, I was a vegetarian from age 30 to age 50.
-S-