"Nature is not so weak that needs protection" Dude, thats kinda ironic coming from a modern person considering how huge are today's issues with pollution and natural resources explotation with no control xD
Fact of the matter is, we could make our planet completely incapable of supporting us in particular anymore with all of the damage we're doing, but the world would kind of just keep on keeping on without us. Other species might even adapt enough to thrive in the new conditions we left behind at that point. Even if no species of any sort is surviving on the planet, at that point that's just the new normal. Nature doesn't need anything at all from us, and even its own state is completely irrelevant.
We're the ones that need things it can provide us in its current state though, so that's why we get the
Kinda glossing over how his next statment is how important it is to find balance.
part of the things. That only matters to us. Even other creatures on the planet would likely just roll with the punches if we don't kill them all off with us.