A title is supposed draw the audience in or sell the product, not summarize it. Are we seriously arguing this?
Tron isnt about Tron, its about Finn.
Grapes of Wrath isnt about vengeful grapes.
Chrono Trigger is barely in the game and even then you can skip its relevant story points.
Harry Potter and the Goblet of Fire isnt about the Goblet...the Goblet has virtually no impact on the story at all.