What do you think about this statement about the danger of a robot army?

In a recent interview promoting his reboot of “RoboCop”, Director José Padilha said: “I actually had a take (which is the premise of the current movie), which is we’re in the future, and drones have been replaced by robots and are being used all over the world for foreign policy and war. Kind of like instead of sending soldiers to Iraq, you send robots to Tehran. This is how we open the movie, with American robots in Tehran, because Iran has been invaded. The idea is, now soldiers don’t die in wars, so there’s no political pressure at home to end wars. Because the reason why the Vietnam War ended is because soldiers were dying. When you take the soldiers away and you have robots, that opens a can of worms.” Source
I was struck by the position he took. Would robot soldiers result in longer wars, since there would be no outcry from the Nation to end the war, and bring the boys back home?