Then there's the ethics bit, which goes like:
* We should not say animals are "only animals" and use that as a reason to eat them, that would be unethical,
* Furthermore, we should not hold them to the same ethical standards, and put the predators in prison and try to reform them. That would be ridiculous because they're only animals.
But you don't seem to be saying that anyway, if subsistence hunters are OK. If the "industrial scale" is the main point, that looks like a solid argument - except why focus on animals? There's also tree plantations, mines, cities, and anything else that isn't sitting in the jungle doing craftwork.