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The article you mentioned specifically mentions inland evaporative pool to turn those brine for road salts or other uses. But the problem is just that no one is doing it.
Probably because it's expensive and needs a lot of land. My point is still valid. The brine is a problem. Just like trash being a problem if not recycled properly (because it's more effort than just dumping or burning it).
That being said, I love the idea of having quasi infinite sweet water supplies but unfortunately it's not that simple.