You have Hall of Fame because those that are in it are Famous. Pop culture has a huge impact on the world. But then that may be why Madona and Blondie are in it, and the real musicians are not. Yes it is a popularity contest, with record sales as the meter by which to measure success. Is it a true meter, no, but it's something that can be measured.
And I can tell you all do care who's in a R&R hall of fame by how adiment you are about who's not in it and how much you protest it's existence.
But what it "is" and what it "should" be are two entirely different things.
But that's just one person's humble (okay, maybe not so humble) opinion.
