You however, are still missing the point that global warming has been going on for millions of years and no matter what we do, we won't have more than a minimal impact on it.
That's not the point. The point is that we are in danger now, and we need to do whatever we can to minimize the damage. We won't know if the task is too big or too hard unless we put in our best effort. We are not a nation of whiners and quitters.