You are too kind to stories - and TED is a good example of that. At the start TED was a place where people came with insights they gathered based on data and turned them into a story. That's risky even in the best of circumstances as scientific consensus tends to change based on new evidence becoming available and retrofitting stories to reflect that is difficult.
However in TED as in life, stories soon became a way of doing away with the need for well-considered evidence and in recent years TED contributions are driven by form, not content. This produced a class of people who produce narrative for the sake of narrative. In our brave new post-modern world of false equivalency everything is an opinion so that it has become pretty much impossible to separate the woo from actual knowledge.