> I don't know where people get this idea that their children are going to appreciate garages full of falling-apart furniture

Are you genuinely asking where they get this idea? People are getting downvoted for giving plausible answers.

The simple one is they appreciated getting it from their parents. It's only very recent that everyone has a surplus of everything, including the parents themselves.

I'm kind of glad my parents didn't just throw a lot of stuff away.