The Earth has a long history and much of it was been a pretty awful environment for life (no oxygen would be a bummer for us, a hellscape of lava sounds uncomfortable and so does being under hundreds of feet of ice). That has nothing to do with how we can do the math about how much CO2 we're emitting and how much the concentration of CO2 is increasing.
On a long enough timeline you're right that there is nothing we can do because among other things the Sun is going to explode, but that's a phenomenally stupid reason to suggest we shouldn't manage greenhouse gasses responsibly. Humans live on a very short timeline, but we're producing effects better fit for a geological scale timeline.
On a long enough timeline you're right that there is nothing we can do because among other things the Sun is going to explode, but that's a phenomenally stupid reason to suggest we shouldn't manage greenhouse gasses responsibly. Humans live on a very short timeline, but we're producing effects better fit for a geological scale timeline.