Your comment is fractally wrong.
Another dumb slashdotism.
If people were smart enough not to live in a desert
How long do you think people can live without water? I think the number is something like four days, give or take. So, if all those people were so stupid, how did they survive more than four days?
Hint: there was actually water available when they got there.
Not a single living person ever moved somewhere where no water was available. The ones who did are dead now. Towns and cities grow organically, and the infrastructure grows with them. This is not a question of whether people are (or are not) smart enough to live in a desert. People will live where life is sustainable, and even here in California, life thus far has been sustained. The fact that we're in a drought at the moment may test that sustainability, but you can't argue that people are dumb for moving here. Up until now, they've had the facts on their side.
Point two, governments absolutely decide where people can and can not live. That is a truism, and I should not have to support it. Try moving into a local park if you don't believe me.
The fact that there are places where one cannot live does not actually prove your point. It only proves that people can't possess other people's properties. All you need to do to found a town is to buy some land and call it a town. And buying land isn't always necessary. Just look at the founding of Oakland.
Point three, there most certainly are people in charge of kicking you out of all the places you might try to live or start up a community, at least in the developed world.
Generally speaking, that's not the case in the United States.
Point four, cities' growth can absolutely be manipulated intentionally, by means both fair and foul, and this has been done throughout history for a variety of reasons.
Yes. And statistically speaking, most towns seek to increase their size, not reduce it.
You wrote that whole shitty comment, and then wrote this at the bottom of it without a hint of irony, didn't you?
Since all of your counterpoints are in fact bullshit, yes. I did.