Arguably, what makes Guy Montag so important is the fact that he is ordinary. He has a respectable, though not extraordinary, job as a fireman, lives in a modest home and has personal debt (because of the additional parlour wall which Mildred has installed). He is also married but feels very disconnected from his wife as she spends so much time listening to the walls and her Seashell radio. As such, Montag is the sort of the person to whom the reader can relate because they likely share some similarities.
Because Montag is so ordinary, Bradbury's message is made all the more poignant to the reader because it implies that everybody- regardless of background or status - needs books and education in their lives. Moreover, Montag's experience shows that books can bring happiness and fulfilment to the most ordinary of people and this is why censorship must never prevail.