No matter the game you play you need an environment to build the world. Be it a chess board, monopoly board, poker table (yes its an environment) or the fantasy/sci-fi or horror world. They all have boundaries and rules on how to interact in that environment. So maps do play a huge part in the RPG aspect as they not only give us the environment but help give us details of that environment. For my personal perspective I like maps. I like the artwork and enjoy exploring the world in a visual way as well as a cerebral way.