The "ecosystem" you refer to has been destroyed, created, destroyed again thousands of times in the wake of asteroids, floods, volcanoes, natural plants and bacteria etc. In fact this happens so often that 99.9% of species were extinct before humans even showed up on this planet.
You act like the interactions of insects and the ecosystem is some mysterious forbidden knowledge that we can't possibly understand and that's just false. Humans understand agriculture quite well. We know exactly where the food we grow comes from, what nutrients it needs, what pollination it requires, how much moisture, etc. We've known these things longer than we've had computers, or electricity. Talk to a farmer some time. The only folks that sound like idiots here are the luddites that believe we should go back to the inefficient agriculture methodologies of the 1800s because it "feels better". Or the folks freaking out that "the insects are dying" because armchair scientists here see less of them going splat on the windshield of their Subaru.