They are unarguably are, in one recent instance a .50 cal robot obliterated a Russian APC at point blank range, in another one held a position on the frontline for over a month.

Obviously they do not replace humans, but when used in the right ways they are extremely effective.

I picture a little wooden catapult throwing ww2 pineapples but I know it's an 8ga shotgun that fires rockets.

The thing with drones is that people are willing to take basically any risk with them, since you are so far away from the action yourself.