That's an interesting view that I don't hear too often as it means that we don't have free will or choices. When everything is under the law of physics and predictable, than our will and soul are material that are under those laws, too.

Or, the other possibility - human impact doesn't matter. We're too small to do any changes to the future, no matter what we do in our confined space. The calculation is not for every human being, but for the development of the broader picture (a lot broader in this case).