I used to think there was good and bad rock music. But when you think about it, all of today’s “music” evolved from early rock, from the Beatles Strawberry Fields to Jaggers Sympathy with the Devil. To me, saying there is good rock is like saying Obamacare is terrible, but Karl Marx was alright.
You’ve picked two specific songs from a specific generation of rock. “Rock & Roll” to kids in the 50s is considered “oldies” to people my age. Rock music in the 70s was evolving but not to where rock music is today.
Rock music to me is guitar-heavy melodic music with meaningful lyrics. Again, nothing involved in the Grammys last night qualifies as “rock” music. That’s “pop” music. Pop is innately garbage.