future generations will look back on eating meat as a barbaric mistake
Primates, including humans, evolved to be omnivorous. In the 200,000 year history of the homo sapiens species, only the most recent 3% have had the benefit of agriculture. Even then, only 0.1% have had the benefit of the industrial revolution which could in theory provide enough calories and nutrients for all humans with a purely herbivorous diet.
”An omnivore is an animal that has the ability to eat and survive on both plant and animal matter.” - Wikipedia