Because it isn't rational reasoning (pardon the redundancy), but emotionally self-serving. It is like the other conspiracy theory "car that runs on water that

Because it isn't rational reasoning (pardon the redundancy), but emotionally self-serving. It is like the other conspiracy theory "car that runs on water that big oil and their government cronies are keeping down". It gives them a bogeyman, a miracle solution, and a simple ordered view of the world. Think about it for half a second and how preposterously useful the water engine would be to governments if it existed. The military logistics of naval ships not having fuel tank but taking in water is just the start.