Ah I just realized that you're the same guy who actually posted that original comment in the first place. In that case, you are aware that you're posting on a German instance, right..? And also, that reddthat is not an Australian instance... it's an INTERNATIONAL instance so of course its gonna federate internationally.
Because why should that make a city worse? Especially in wealthier areas? This is not comparing the average hapiness, rather, it looks at things like public transportation, ...
I guess there's multiple ways of looking at things. When I think of liveability, it should keep up at least some standard of living for everyone living there. And the conditions I've seen in places like Frankfurt came to me as quite a shock how that was even possible in a developed country