Some of the best literature ever written isn't very "important" (although, I think you're greatly underestimating Calvin & Hobbes's influence)
Secondly, I also question the influence of Bob Dylan. There's no indication that he was anything but a reflection of the political turmoil at the time. He was just a poet with some banger turns of phrase. I also found his emotional distance to the actual politics to be rather distasteful (compared to, say, 2pac's first album, Joey Bada$$'s "all amerikkkan badass", and like half of Kendrick Lamar's work, many varied feminist artists now like Mitski & Laufey, the anti-war influence on the then Dixie Chicks, now the Chicks... i'm sure you could come up with thousands of artists with more to say than bob dylan).
C&H's political expression speaks much more to the absurdity of the values and habits that entrench themselves by adulthood, and help us question which of these are meaningful, rational, and necessary. A different sort of politics for sure, but one that is certainly relevant to most households across the country. Most of the political angst that comes through the adults in the form of disgust with cultures of consumption and commodification, the absurdity of a biker pitted against car, the joy of giving an F-15 to a trex rather than a modern state, are no less salient today.