This is a good point as while there’s not an agreed upon formula for how many nonhumans are worth a human, I’m certain that the vast majority will prioritize human life over animals.

Fortunately, the human growth rate is stabilizing so hopefully we can figure out how to have humans grow to a natural equilibrium AND keep diverse ecosystem. If the question is framed as either humans or animals, society will end up with only zoos, farms, and humans.