I'm confused on the point about the suffering of insects. Most efforts to stop animal suffering in wild animals focuses on human caused suffering, which isn't at all necessary. But most of the deaths and suffering endured in nature is... natural. I assume it's horrible being eaten alive as a caterpillar, but the bird that ate it did it for it's own survival.

I feel like that section had an implicit argument for us to stop all the suffering in nature, rather than just human caused one. Am I misinterpreting it?