No. I certainly don't see him as a cultural icon, nor a political visionary. (If anything, much like Bob Dylan, I prefer when Browne's lyrics are NOT political; his best songs deal with personal experiences.) I've never found his vocal delivery particularly exciting. It's fine. And as far as his "relentless avant-garde attitude", I don't even know what the #### that means.
I love this album for the same reason I love most of the albums I have selected thus far: I love the tunes. I love the craft, even if I don't know enough about music to explain why I love it. I love singing along. I love the melodies; they stick in my head, and in a good way, not as an earwig. The other stuff you quoted is just meaningless background noise to me. I'm a pretty simple guy when it comes to this stuff.