Can you read? Then you can do the research. I eat meat and am also very healthy but that doesn’t mean anything without the research to back it up. Not only is meat a good source of protein for building muscles but it also a good source of healthy cholesterol and fat. Perhaps you grew up in an arid, warm climate where those things aren’t important but in colder climates fat is a requirement to help stay warm. Where you see the largest consumers of meat products will almost always be in the colder climates.