>It's surely making sense for them, so what can we learn from that?
Just because a country does something, it doesn't mean it's the smartest thing to day (you can deduce that logically by realizing that different countries adopt different policies).
It could be the smartest thing for that country to do; it would be foolish, for example, for Afghanistan to get freshwater by desalinating seawater, but would make a bit more sense for nations with a coastline.
Just because a country does something, it doesn't mean it's the smartest thing to day (you can deduce that logically by realizing that different countries adopt different policies).