This is the kind of proposal that might fly well when it comes to the discourse over meat. People say “but we could be growing other crops instead of feed for cows”. Well yes, but you need protein in the diet. You can’t grow potatoes and veggies and expect people to survive only on that. Then there’s the question of land utilization. Historically cattle was raised for meat and dairy where agriculture was more difficult as compared to grazing cows, sheep, goats etc. The modern corn, soybean and alpha alpha farms may be able to grow other crops, but would they be able to support the crops that are needed in nutrition? Chicken and other more efficient substitutions may be the answer here.
You can absolutely survive and thrive on a vegetarian diet, and there is decent evidence suggesting you're health will be better.
> You can’t grow potatoes and veggies and expect people to survive only on that.
I'm sure most medieval people survived (without food types being a detriment to their health/lifespan) on vastly less meat than most of us eat nowadays.
I don't want to live a "medieval peasant" lifestyle, obviously, but I don't think the food part of it would be unhealthy (assuming enough food).