In my experience, people having too much shit, is not because they have "additional tools simply to maintain the important items that they own", but because they buy all kinds of unnecessary shit. I've seen less poor people with "tools to maintain the important items that they own" and more middle class / rich people with BS tools and sheds full of tooling that they rarely if ever use + all kinds of other consumer crap that is not related to tools.

If someone needs "additional tools simply to maintain the important items that they own" the can still be totally minimalist.