The real villains in our diet are sugar and ultra-processed foods

The best current answer to that: It’s possible to eat as much meat as we do only if it’s grown in ways that are damaging. They’re damaging to our health and the environment (not to mention the tortured animals) for a variety of reasons, including rampant antibiotic use; the devotion of more than a third of our global cropland to feeding animals; and the resulting degradation of the environment from that crop and its unimaginable overuse of chemicals, soil and water.