Caged people are actively denied access to clean water that is readily available in their vicinity. They aren't in these cages due to aimless wandering in the desert - the state put them in there.
It seems to me you are making the exact error in argument I react against. Stop making everything a "human right". You see, in the end, when you've made everything "human rights", the whole "human rights" concept will cease to have any meaning whatsoever and you will have lost.
This isn’t cleanly mapped to typical notions of human rights, but it’s still a question of rights.