Ding ding ding. Rubble-covered battlefields aren’t the end-goal here. The end goal is urban warfare, precision strikes, and area denial by police. Cops can post these on patrol outside of a billionaire’s house. Charging isn’t an issue, because you can simply have them automatically return to base for charging, and patrol in automatically rotating shifts.

Or have them near protests, and “accidentally” start killing people. When people get upset, cops will go “oops it was a malfunction. Too bad you can’t blame us for that. Because of, ya know, the malfunction. It totally malfunctioned. 100% wasn’t programmed to kill on sight, to break up the protest quickly. Nope, definitely a malfunction.”