I don't see any sense in all this thread.
First of all, plants are obviously not carnivores, but even if they were... how is that related with veganism? Do they only want to eat "only things that don't eat other things" in your mind? Say that "C" is "meat" is literally selling pencils like diamonds.
Every carnivor chordate (the only thing that seem to be a problem to vegans are chordates) eat more animals than "one" or more animals than the number of animals it produces, or at least, "more weight. Small birds like sparrows eat three times their weight per day I think.
Veganism is just based in feelings, I don't have the same feelings, and that's all. I mean, if their argument is "it's more healthy" then they are not vegans, they are vegetarians, or they just don't eat meat. Going to "why" do they think that, is going to psichology or that kind of things, and asume that they are all equal, when it's not that way. Vegans don't treat better or worse the rest of humans by being vegans, and so, I don't mind about them.
I enjoy seeing "nature" more than many people, I can tell an enormous amount of "useless"facts about ants, for example. And I give value to diversity, a lot of value compared to many vegans (since I can at least explain what I'm talking about when I talk about diversity). But I don't have any bad feeling at all when an animal dies and I eat it. I can respect their feelings, but I don't see farmers and scientists as ignorant, stupid or bad people, they just do the same, they kill, and they eat. I see stupid to wear a death animal, but not because of the pain, but because of paying a lot for being... pretty? etc.
http://images-cdn.9gag.com/photo/awKQ3qr_700b.jpg