"In the long run, we are all dead" is a truism that tends to prevent action. "In the short run, I still have to hunt mammoth" is much more motivational.
People who live in the future, or the past, aren't alive today. Be alive today.
Big issue thinking, only works if you are a world leader, and have totalitarian powers. People idly waste their time, imagining what it would be like, how much better it would be, if they were a world leader.