On average, most people learn more from negative visions. But all it takes are a few people to internalize and chase a genuinely inspiring and challenging vision to save the world for another few decades!
One other angle might be to consider how notions of going to heaven vs avoiding hell have affected different Christian leaders and movements over time.
I think it's interesting how what is considered dystopia changes over the years. The concept of an always connected phone 50 - 100 years ago was horrifying to many more people vs today.