Awesome! Made me think of the trend of arrogance in the U.S. - overzealous patriotism and all that... codpieces, jizzum, rockets. When he shows the effect of our trust in our modern world on the discarded natural world, it makes us seem like babies raised in test tubes that we've learned to love. We love things like Tang and Clorox and technology, and we love man-made labels of prestige like Composer and Senator and Sheriff. We're so great, why wouldn't the other galaxies want our come, so they can be just as great as us?! Vonnegut sure has a unique and entertaining way to show us the shadow of ignorance beneath our arrogance.
I think over-zealous patriotism exists the world over. Everyone thinks their sports team is the best; obnoxious, over zealous fans only exist on the other team.
If you like the hyperbole here, check this Vonnegut out