I disagree with this I think. My jam is rock and roll but that doesn't mean I haven't respected and looked forward to headliners from other genres in the past.
Adele, Elton John, Dolly Parton, Jay-z, Beyonce, Kanye west, the prodigy, stormyzy, David Bowie. All artists from genres I dont like at all but at least respected and had a buzz about because they are icons from their respective genres.
This years lineup seems like a shit show in comparison but I'm old and grumpy so maybe its just I dont get the kids.