I'm gonna call BS on this unless you provide a citation.
Many people (in the west) eat a breakfast (cereal, pancakes, waffles, bagel, toast) or lunch (PB&J sandwich, salad) that contains no meat every day or every workday. Then you have to account for all the meals where there is no meat (pizza, mac and cheese). You'd need to have a substantial fraction of the population eating meat (almost) literally every meal in order to make up for the people who habitually don't eat meat at particular meals.
Edit: I'm talking about meat for the purpose of environmental impact and sustainability here. I'm not talking about meat from the perspective of strict veganism or the milk in your coffee or the eggs in your baked goods, those have negligible impact compared to raising animals to slaughter for food.