#They do try. But it's difficult, and doesn't really work out.
They do try. But it's difficult, and doesn't really work out.
There's nowhere else to go. That's the world now.
Given the events of Fury Road, it's clear that there's been an environmental disaster, in addition to the societal collapse. Additionally, it's not clear exactly where this stuff is happening. I wouldn't be surprised if the wasteland we see was previously a verdant paradise.
Even if there was a safe haven somewhere, and one somehow found out about it, getting there would be nearly impossible for almost everyone. They'd have to cross the wasteland, which is difficult enough even with the resources of a warlord like Immortan Joe.
As further evidence, look at the plots of Road Warrior, Beyond Thunderdome, and Fury Road. All of them are about groups of people trying to find some fabled paradise. They need Max's help to even make the attempt, and none truly succeed.
The group he helps in Road Warrior forms the "Great Northern Tribe". It's still a tribe in a post-apocalyptic wasteland, just near the coast. The group in Beyond Thunderdome settles in the "nuclear-devastated ruins of Sydney". Probably better than the middle of the desert, but still a tribe in a post-apocalyptic wasteland. The group he attempts to help in Fury Road finds that the Green Place is now an uninhabitable swamp, and decides to return to the Citadel, as it's the best place available.
