We aren't even capable of caring for one another, let alone the EASIEST to maintain, most naturally human friendly habitat we would ever encounter in the cosmos as we evolved to fit it.

I would argue that having 8 billion people in the same place makes earth the hardest place to live in some ways.

One of the options that space habitats would allow for is smaller communities. What if you lived in a space station with roughly the population of a city? Your community wouldn't necessarily need to be affiliated with other communities to make up a "country", but it could be. Your community would have that option. And if the community is not geographically connected to the other members of its nation, there's no reason they couldn't change their mind, join a different country if you're views seem better aligned. For the first time humans would have opt-in governance.

Would opt-in governance lead to a more stable society? Would not being stuck geographically near communities with opposing views lead to less violent aggression? I don't know, but I hope so.