Why it's important that historically-accurate people argue back against the silly "a GM conspiracy killed all the streetcars, just like in that movie" story.
I think the conspiracy is comforting to people -- "a few bad guys did this." The reality -- "electeds, planners, and most of the public believed that the car was the future and rail transit was outdated" is actually more unsettling since it raises the question of what we're getting wrong now.