If removing some critical element of an ecosystem has a chance of triggering a complete ecological collapse that, for instance, wipes our human food chain (the way I imagine a total and sudden extinction of pollination agents might), then yes: I don't want to accidentally kill billions trying to save millions.

I don't know if this is generally plausible, or if it is a significant concern in this particular situation, but I certainly think it cause to be cautious until I have more information.

That said, lives are being lost, right now, while we're being cautious.