All criticism of the RRHOF usually boils down to people being miffed that their particular pet band or artist has not (yet) been included: "A is in there, but B is not, how unfair!" The ole finger pointing game.
My stance is more encompassing. I don't give a flying flamingo whether Ms Parton or Mr Richie are in the RRHOF. I do find it puzzling, however, that certain acts like BÖC, Free, Bad Company, Rory Gallagher, J. Geils Band, Foghat, Chicago, Mott the Hoople, Peter Frampton, Doobie Brothers, Grand Funk Railroad, Humble Pie or Jethro Tull are somewhat glaringly omitted (my suspicion is that Dave W has a hand in this, they are all arena rockers). Their case isn't bettered though by keeping acts like Eminem, Dolly or Lionel out of the RRHOF.
It goes back to what I wrote before: The RRHOF is a forum for putting popular music - basically any kind of pop music - under the spotlight of public awareness to bolster and depict the cultural impact of popular music as an art form. In essence a lobbying organisation. Claiming that it should only admit "real rock" - please define, we can't even agree on what exactly that is here in the LBO which bears a certain affinity for "rock" - misses the point.
In the meantime, everyone should just be patient: Even a band such as Deep Purple - never really cool, never much charting with singles and deemed perennially without any cultural impact worth commemorating - eventually lumbered on crutches into the RRHOF. Other acts will follow. If anything, RRHOF's induction policies have become less elitist in the last 25 years or so. As more and more bands and artists get in there, they are obviously running out of suitable candidates, especially as post-baby boomer eras have not spawned as many bands and artists with longevity.