Much more complicated than just the screens shown here, search was one of the tools given to users to cut through our vast amounts of event and venue data. Touched on before, each tool was meant to satisfy a different "explore mode," i.e. are you looking for a place to go now, or later? Do you know exactly what you want, or do you need guidance?
The legend was intended to help users who were on the fence by providing the most information possible at a bird's-eye view; search was always built for the users who knew a bit more about what they wanted.