If a diet consisting of lab grown meat resulted in fewer animal deaths than a plant based diet, would we be morally obligated to eat it? So hypothetically, if lab grown meat takes off, comes with absolutely no cruelty to farm animals, and say keeping 10 animals to harvest cells from would produce years and years of lab grown meat, to the extent that crop deaths from eating a bean burger are higher than crop deaths from a lab grown meat burger (those 10 animals would still have to eat and would result in a few crop deaths obviously). Are we then not obligated to eat the lab grown meat burger? Could a carnivorous diet end up being more vegan than a plant based diet? 

Not interested in the health argument so much, just a discussion on ethics.