memes

What you are missing here is that we wouldn’t need to grow more food than we do now, we would need to grow less. Whatever issue you can point at for growing enough plants to feed the world, we’re already dealing with now. We already grow enough plant based calories to feed the world over, we just feed it to cows and other livestock. We would need to use less pesticides (not to mention antibiotics) even if everyone was vegan.

You are also narrowing in on obscure edge cases. As others have pointed out not all problems need to be solved and not all people need to adopt a vegan diet for us to make progress towards sustainability. It would be like worrying about the grid and battery technology and strip mining required to create solar panels etc. in the transition to renewable energy. worthy causes for sure but not justification to keep using fossil fuels.

And people don’t even have to change their moral judgment in the case of doing it for climate reasons. They are free to keep believing however they do. Though I suspect that once people stop eating meat for pragmatic reasons the motivated reasoning behind their moral judgment will collapse.