They might be the biggest bands of your time, but they aren't the biggest band of many people's time including mine. Most of the music I'm most interested in was originally recorded on tape and not digits. Most of today's rock bands aren't in the same league talent wise as those from the 60s and 70s IMO.
I grew up with the music of the 60's and 70's and much of it was the same tripe that you think todays groups are releasing. If I never have to hear another Beatles tune, Stairway to Heaven, DOSM, et al I will be a happy man. Been there, heard it all too much.