I can't be fucked to actually type out a whole argument, but not eating meat is bullshit.
Animals getting killed to feed us is nature. It's the fucking food chain. If we weren't supposed to eat meat then all our teeth would be flat and used for grinding leaves. Our bodies are specifically designed to accommodate meat.
I can understand the pity people feel for animals, but let it go. It's nature. We shouldn't fuck with nature.
Why is it bullshit? It leads to living a humane compassionate life. From a moral standpoint, actions that harm others are not matters of personal choice. For example, murder, child abuse, and cruelty to animals are immoral acts, not matters of choice. Today, our society encourages meat eating and factory farming, but at one time, society also encouraged slavery, child labour, and many other practices that are now universally recognised as wrong. I don't buy your comments about it all being 'natural'.
And a vegetarian diet suits the human body better than a diet that includes meat. Carnivorous animals have claws, short digestive tracts, and long, curved fangs. Humans have flat, flexible nails, and our so-called “canine” teeth are minuscule compared to those of carnivores and even compared to vegetarian primates like gorillas and orangutans. Our tiny canine teeth are better suited to biting into fruits than tearing through tough hides. We have flat molars and long digestive tracts that are suited to diets of vegetables, fruits, and grains. I really don't know where you got that teeth and body argument of yours cause it's totally inaccurate.
I doubt I'd ever be able to go full vegan, so tuna would be a good source of protein too.
Please don't call yourself a vegetarian if you eat seafood and chicken. Just do me that favour. If you stop eating meat and continue to eat seafood then you're a Pescatarian.