So according to your logic, a person requires a level of success approximately on par with a Vonnegut to appreciate an errand to the post office? Anyone significantly less successful than him can't consider the possibility of a leisurely stroll?
I understand that not everyone in this world has the luxury of free time, but if one has the ability to shop on Amazon, making time away from work and the internet is almost definitely an option. It's thinking like that which will hurtle us towards an Idiocracy-like reality.
"The whimsy of Vonnegut betrays the truth that too many of us suffer from too little time in the day to create genuine, shareable moments with one another." - Is this an absolute truth? Maybe the point is that we should work towards having more of this whimsical time, instead of submitting to the unnatural bustle of modern life and pressing buttons for more fucking laundry detergent.