cutting out meat gets rid of saturated fat and cholesterol from animals, which both can cause some heart issues. typically, the protein needed can be replaced by increasing intake of beans and nuts. if they're doing it for diet reasons specifically to lower satfat and cholesterol, some vegetarians called piscovegetarians will not eat red meat and poultry but still eat fish, because they're high in healthier types of fats and protein without satfat and cholesterol
understood
what i really meant was those people who don't eat animals because they think every animal is a pet
sure, i feel bad somewhat for animals that we eat, but i still eat them because they taste good and im not an annoyance to everyone who eats meat. i will never want to go to a party and not participate in dinner because i don't eat meat, that's being picky.