> But it's not a valid reason to deny the warfighters the best possible weapons systems.

Of course it is.

Think about it this way: if you could guarantee that the military suffers no human losses when attacking a foreign country, do you think that's going to more or less foreign interventions?

The tools available to the military influence policy, these things are linked.

US military is already overwhelmingly powerful, there's 0 reason to make it even more powerful.

That's so delusional. The US military is currently preparing for a potential conflict with China to stop an invasion with Taiwan. They don't have anything near "overwhelming force" for that mission: recent simulations put it about even at best. People who believe they don't need any improved autonomous weapons are simply uninformed.