We live in a big “tourist” area of America and people come here in winter to escape the bitter cold of the north. They only stay till their “home” area gets more comfortable for them and then, they’re gone!
They aren’t really “citizens” of our state… They’re just visiting.
That’s the same for us on this earth who have been “born again” in Christ. We are not citizens of this “world system” or of it’s ways.
Many believers are just very comfortable in this world system and this what Jesus talked about in this parable…