Yeah I agree that it's not really RnR and in order to be inclusive they are basically a music hall fame. Does Prince go into the RnR hall of fame? Dude could kill a guitar riff but did Prince ever think he was making "rock music"? How about MJ, that guy could dance really well and he had Eddie Van Halen play on a record, so hey.. toss him in there too.
The whole thing is a joke. Starting off with the fact it's in Cleveland OH. RnR started in the South, specifically in Memphis TN and the fact that Memphis (an absolute abortion of a city) was too bumbling to land the HOF speaks to their collective stupidity.