Why is bill walsh considered a "legend"?

Walsh revolutionized many aspects of the game most notable the West Coast offence but also how teams practice and approach the game. He favored brain over brawn in a very physical game. There are many teams with great talent but it takes a great coach to win Super Bowls. He claimed 3. He is worthy of the legend moniker and made the Hall of Fame on his first nomination. Stanford has never been known as a great football superpower but I'd bet Walsh never let up for a minute training and teaching his players. He was a winner of the first caliber.