How is "On Dumpster Diving" a definition essay? Do you agree with Eighner's conclusion about consumerism and societies obsession with obtaining things?

The author uses many instances, examples, and comparisons to create an understanding, albeit Lars' understanding of a definition "On Dumpster Diving."  However, Lars' text speaks more to me about the survivalist guide for the homeless, or even how to safely salvage dumpster refuge.  Even so, I noticed that Lars' makes the statement, "Something like this drives the obsession to collect junk", this statement refers to the authors own distaste for wasted food thrown away.  And though I would agree with the question of whether I agree, I do.  However, indirectly stated, Lars' piece doesn't strike me as a conclusion, as much as an personal position that justifies dumpster diving.  Of course, I'm reading between the lines here, but this entire piece screams, "So What? I'm a scavenger.  Leave me alone!"    Or, "I'm too proud to visit a church, or eat at a soup-line."  Here again, my rhetoric is self-serving, probably only appreciated by a fellow vagabond that has walked this walk, not for one year, but for many years.  Even now, though I eat little during the day, scavenging for food is a luxury, not a necessity--not yet.  With the mission serving breakfast, lunch and dinner, their is no shortage of safe, clean, and free food.  Beyond this, their are churches, a diner, and activities that cater to the homeless.  Even so, I still find myself peeking into a trashcan, or food receptacle looking for that freshly discarded appetizer between meals.