Iirc, the newer dogs are already water, emp, and small arms resistant.

Sure. But from what I've heard, they have something on the order of a 10-30 minute battery life in anything but "stand their and do surveillance" mode. From a pure calorie perspective, animatronics are still painfully inefficient compared to - say - a human with a belly full of oatmeal on a bicycle.

Even beyond that, a lot of the Elon Musk brand of robots are primarily human-operated. They need to carry around high end receivers to get far from their home base and they require a talented technician to keep them pointed in the right direction.

There's a reason you don't see many of these devices in the field, particularly unattended. Given the high end components that are involved in their construction, anyone with an eye for salvage will just see a walking pile of dollar signs.