Yeah, but if those are the only people who get in, what's the point? They don't need a Hall of Fame. Everyone already knows all of those people, and they would be considered in their rarified air without the Hall placement. And the number of people that EVERYONE or MOST consider to be legends is tiny. You wouldn't need a Hall of Fame, you could get by with a Closet of Fame.
The point of any Hall of Fame is the people that wouldn't be unanimous selections. Those are the ones that people can learn about, and explore their careers. I don't need to listen to Pink Floyd's discography again to know that David Gilmour is a legend. But I'm not all that knowledgeable about the Spinners, so if they have been nominated for the Hall, it must be for some reason, so I may start exploring their output.