At the expense of humans, yes.

[Wan's voice was sad as he went back to looking at the overgrown houses.]

Part of learning to live together is doing so without invading another's home. The spirits didn't do this on purpose, but they did it all the same. To give themselves a home, they drove out those who were already living here. That's not right or fair. To spirits or to humans. It creates resentment, anger.

...has anyone tried burning the vines yet? I don't expect it will work, but, no one has resorted to violence in retaliation yet, have they?