Using sustainable practices "they only eat a little" is totally valid. The way we farm now.... A pest outbreak will ravage a monoculture crop.
I know there are great alternatives, but they all have higher labour requirements. Modern capitalism can't tolerate that. If we can find a better solution now we can mitigate the damage before we end capitalism. After that we can definitely switch to more labour intensive sustainable practices. I'm not an accelerationist so I'm not rushing to end the current world order before trying to make all the improvements we can.