I think I count 4 categories of arguments about vegetarianism:
Some of the arguments against meat eating presume animals are equal to us. For example arguing that a cow's life of 20 years is being cut short seems like an equality based argument. It argues that a cow's life matters, not merely the quality of it.
Some arguments against meat eating presume we should be kind to animals. So these are like arguments about the inhumane nature of the beef and chicken industries. These don't presume that the lives of animals matter but that their suffering matters.
Some arguments against meat eating focus on problems with the food chain, such as diseases, human digestion,, food supply problems and environmental challenges.
Some arguments against meat eating are emotionally based. All cows are like puppies and kitty cats. Chickens are like Woodstock.
Some of the arguments against meat eating presume animals are equal to us. For example arguing that a cow's life of 20 years is being cut short seems like an equality based argument. It argues that a cow's life matters, not merely the quality of it.
Some arguments against meat eating presume we should be kind to animals. So these are like arguments about the inhumane nature of the beef and chicken industries. These don't presume that the lives of animals matter but that their suffering matters.
Some arguments against meat eating focus on problems with the food chain, such as diseases, human digestion,, food supply problems and environmental challenges.
Some arguments against meat eating are emotionally based. All cows are like puppies and kitty cats. Chickens are like Woodstock.