Honestly, the whole idea of raising living beings for food is really disturbing to me. There's a disturbingly narrow line between eating canines and eating bovines. Yet one is morally repugnant, and the other is delicious! It's better if I I just don't think too hard about where my steak came from...
So, yeah. I understand the vegetarian angle. I know about eating at higher trophic levels. I'll even grant that we're not designed to eat meat. (I don't think we were 'designed' at all. But that's a whole other argument...)
But it is sort of difficult to argue with success. I mean, we got where we are today by, generally, eating meat. Meat offered us the concentrated protein, that allowed us to get off the farm and into the laboratories, factories, etc.
I'd like my meat to be healthy and treated well. It should be raised in an environmentally sustainable way. I'd like it to be grass-fed, thank you, and humanely killed. I'd like it carefully ground, lovingly grilled with a dash of salt, and placed on top of an egg bun with some applewood-smoked pepper bacon, a hint of BBQ sauce, a little lettuce, a slice of tomato, some grilled onions and a slice of mild cheddar cheese. I'd like it parked neatly between a cold wheat beer and a pile of shoestring fries.
But in a pinch I'll settle for a number two combo, no onions, no pickles, medium sized, iced tea, to go.