Why would you build a very expensive bipedal robot to suicide bomb someone, when as you note, a very cheap flying drone could do the same thing? (and more over: already is, this is literally how drones are used in Ukraine).
Which of course leads to point 2: it's very easy to take a moral stance on weapons when you don't think you're in any danger, nor going to be doing any of the fighting otherwise.
Which of course leads to point 2: it's very easy to take a moral stance on weapons when you don't think you're in any danger, nor going to be doing any of the fighting otherwise.