Relieving yourself outdoors is natural, and we've been doing it for ages. Killing intraspecies rivals/competitors is natural, and we've been doing it for ages. Dying of a preventable disease is natural, and we've been doing it for ages. I don't think we should base our behavior off naturalistic fallacies.
Is eating meat better for your health than abstaining? Usually not. Is eating meat better for the environment? Usually not. It's very easy to just eat meat and dismiss veganism as impractical because that's the socially dominant position to have.
It's easier than ever to transition to a more vegan diet. There are hundreds of replacement products to ease your transition if it's something you care about. There are ethical, environmental, and health-conscious reasons to reduce or eliminate meat consumption. Conversely, many arguments for eating meat are just appeals to tradition or appeals to nature. The industrial production of meat, which is universally detested, actually supplies the vast majority of meat consumed in the US.