i think that it is the advertising, and i agree with you about the 90s kind of pulling all of the focus away from the rest of the band.
guys like Dan Vickrey of the counting crows and mark bryan of hootie and the blowfish didn't really get much credit, in lieu of the lead singers being pushed to the forefront. Today i couldn't even name a guitarist other than dan auerbach sp? from the black keys, or jack white... and they are also the leads singers... I recognize the A7X guy, but before this thread couldn't have told you his name.
the last band that actually had great musicians (and i could name each member of in entirity) was Rage Against the machine.
Zach de la rocha on vocals
Tom morello with insane riffs... each CD had the disclaimer: all sounds are made by guitar, there is no mixing or synth
Timmy C (commerford sp?) very underrated bassist
Brad Wilk... he was just insane
then obviously soundgarden douche came in and the band was OK... granted not near the level of RATM imo...