actually they can be very useful as well but they have a public image problem https://en.wikipedia.org/wiki/Project_Plowshare https://en.wikipedia.org/wiki/Pro

actually they can be very useful as well but they have a public image problem https://en.wikipedia.org/wiki/Project_Plowshare https://en.wikipedia.org/wiki/Project_Plowshare artifical lakes, mining, terraforming, diverting asteroids, propulsion for extremely large spaceships, fighting intergalactic invaders etc.