"Why not stop wasting our time by watching, preaching, commenting, reading, and/or buying books on these subjects and wondering whether infinity exists, and actually do something more useful, something that will help all the characters with whom you are stuck inside of the same game?"

The author completely missed the point. It is through the thought of such questions that we are coming closer to the possible truth. While helping others is completely meaningless, because the others might not even exist (see solipsism) and even if they did the actual helping would create small differences that would be completely different in the indirect future. And I came to this conclusion using thought of such questions.