On one hand, it is incredibly demoralizing and terrifying to the enemy to fight robots. When the operator gets tired he is simply replaced by another. If you "kill" a robot the other robots won't be psychologically hurt by the experience etc. So yes, it's a good thing in a way.
But it can also be expensive. And the US already spends a lot of money on defense. If they tried to be nice for a change and offer food and things to those poor souls in the Middle East instead of bullets and bombs, maybe they wouldn't hate you so much to want to blow you up. The war on terror creates more terrorists than it deals with. Which is probably the entire point of not just the war on terror, but of these robots. There's a lot of money in war. The industrial military complex wouldn't survive without wars and technologies like these. I can't believe Hideo Kojima of all people predicted the war economy crap 20 years ago.