I hear what you're saying, but I instinctively reject rating music or films or any creative effort on "generational" grounds. Every era has tons of crap. When Mencken reviewed books, he read just about everything that crossed his desk. He conceded that much of it was shit, but he reviewed it anyway because he felt that each book was one person's effort to express him or herself, and thus should be respected, even if it was third-rate. And every once in a while, he'd discover a writer of some talent.
As for the Stripes, I think Jack White is working in Cobain territory, and Cobain himself was the best rock composer since Pete Townshend, known for his on-stage destruction of guitars and amps, which he did, as he once said, to cover the fact that early on he couldn't play the blues licks he desired to play. So he thrashed about, spectacle-style. An affront to Serious Music Lovers back then, I'm sure.
DP