The point I was trying to make is that a civil engineer from the US might take a lot of factors for granted. And given those factors it would completely make sense to build a pipeline. But it sounds like those factors don't apply in Sana'a.

It's not the OPs inability to believe that's the problem. Show him all of his flawed assumption and he'd readily change his mind (I would hope anyhow). But how do you disabuse him of those things which he takes for granted here in the US? That's a difficult process.