i've been an ovo-lacto vegetarian (i eat eggs and dairy products) all my life and i must say that none of these arguements have really come into play.
i was a vegetarian because my parents were - i lived in india for the first 13 years of my life - so this is a cultural / religious thing for them
the reason i'm still vegetarian has nothing to do:
- my religious beliefs (i'm not very religious, but i do believe that some higher power exist - i'm possibly agnostic. if anything, i'm a strict evolutionist)
- my morals (i don't think it's wrong to eat animals. all my friends except one are non-vegetarians and it doesn't bother me when they eat meat. it doesn't bother me when i handle meat. i've cooked meat for my friends before.)
- the fact that animals are bred to be food (ok... this is just like farmers growing plants for food, there's no difference. like it or not, plants have a "life" too, one that people take away by harvesting them, i might add)
- my health (i'm like 50 pounds overweight, so it's not like being vegetarian keeps you healthy - only a proper meal plan and regular exercise and / or a nice metabolism does that)
- financial reasons (hell, it's cheaper to buy food with meat in it that it is to buy food without meat in it)
so pretty much the only reason i'm still vegetarian is because i'm resistant to change. i don't try to convert people to vegetarianism. if they want to, good for them. if they don't want to, good for them. i went to high school in east texas, and a lot of people tried to (jokingly or not) make me eat meat, but when i explained to them that the only reason i was still vegetarian was because i was resistant to change, they understood that. if it gets to a point where i will have to go out of my way to stay a vegetarian, i will start eating meat.