Also hoarding spread out over a family like that is a sign of serious generational trauma that takes time to heal. Or could be a sign of financial insecurity.

Or there may be a genetic component, as there seems to be with so many things.

Though, to be honest, LW is so freaking annoying that I'm not willing to accept that these people are borderline hoarders just on their say-so. "Stuffed" and "overflowing" could mean almost anything from somebody determined to be hostile and judgmental.