I believe that trend started in the 90's when the moneymakers began generalizing and reorganizing categories of music, which is why I don't watch music awards.
Btw, I really hate Coldplay with a passion. Just something about them that is painful to listen.
Good rock music and this is my opinion, equals a great drum, bass and electric guitar, etc align with lyrical composition and pulling it off effectively, Anyone can listen to a song and say- " hey, I like that " but we end up not putting into the music itself- does that make sense?
For the heck of it, and because I am a huge music lover, I recommend listening to the following titles-
and before doing so, if you have them, a nice set of ear cupped earphones- I have had Koss for years and love them.
I just uploaded this to my playlists late last night too;
Billy's got a gun by Def Leppard
Two lane blacktop by Rob Zombie- now this may seem debatable, but the hooks are something.
Revolution man by Union Underground
Another one bites the dust by Queen
Louder than hell by Motley Crue