we must bear responsibility to bring things back to the balance they were at before we got there
The idea that nature was in some sort of balance before humans came along is a common misconception. Most ecosystems are dynamic, and change over time. What we are doing is accelerating that change to a dangerous level.
This might seem like an academic distinction, but many conservationists have caused more harm than good by trying to ‘freeze’ ecosystems at a state that existed at some fixed point in the past. I believe it was George Monbiot who pointed out that the margins of many British roads had higher plant and insect diversity than many ‘protected’ areas.