Hmm. Knee jerk answer: No, in the grand scheme of the universe - comics don't matter.
slower, more thought out answer: well, yeah - they must matter. People buy them, and the companies make them- and NO company does anything on that grand a scale if there aint money in it for them. So they matter to the folks that buy em, and to the folk that sell em. (and the folks that argue passionately about them on internet forums! )
More thought out answer: Yes, they matter to ME - because they were an integral and important part of my childhood, they helped form how I see the world (visually - I'm a visual person), and they were my personal "John Wayne" movies.
Longer, deeper thought out answer: no, they don't matter at all - because really, nothing matters. Does it?