If it was useful/needed, it wouldn't be laying in unguarded piles in the desert. What's left over is the stuff that's so useless that even the poorest scavenger

If it was useful/needed, it wouldn't be laying in unguarded piles in the desert. What's left over is the stuff that's so useless that even the poorest scavengers aren't interested in it. Even if it might be useful elsewhere, it isn't in that other place because it's so worthless that transporting it isn't worth it. "Would be" useful elsewhere just means "useless where it is". Just like most of the stuff that Amazon gets criticized for throwing in the trash is likely either stuff that's unsafe or so worthless that the pallet-of-random-crap buyers don't want it.