it means we can change it enough that it will no longer support US, but life continues at its own rhythm, we are oarr of that rhythm, not separate from it

We are not the first instance of life forever changing the environment to the point of mass extinction. When early cyanobacteria figured out photosynthesis, the amount of oxygen in the atmosphere they produced as waste killed off massive numbers of other species for which oxygen was toxic.

However, we are the first instance of life capable of understanding our place in the ecosystem enough to do something about how we as a species affect the biosphere and the pressure we are putting not just on other life forms but on ourselves as well. We are not mindless cyanobacteria pooping out oxygen to the detriment of all others; we can and MUST do better.

A huge part of that is understanding exactly what you pointed out: we are part of the ecosystem, not separate from it. I just wish someone could get the mega-wealthy and fossil fuel CEOs and politicians to understand it. There is no safety for them; their money and power will not save them.