I question whether that's the dominant assumption. I know there's hoarders, but there's also loads of "stuff" associated with day-to-day life. Live in one place and you'll have boxes of bandages and aspirin, tools for fixing the lawn mower, a small compressor for blowing out your sprinklers, board games, extra coffee mugs, shoes that are ok but you don't like very much, on and on. None of that "junk", even if you might use it rarely and certainly won't perish without it.

There's little nobility in throwing out your fourth set of perfectly serviceable bed sheets or the nicked pair of nail clippers in the guest bathroom. Which leads to accumulation, like moss on a tree.