Surely it's the precision that makes them war crimes? If the missiles weren't meter-accurate, and the intelligence didn't eg show the lines painted on the playground (even in images available to the public) then they would be able to pass it off as mistakes or enemy propaganda.
No, what makes them war crimes is the intentional targeting of non-combattants. Being lousy at aiming weapons does not absolve of any war crime.
The accuracy helps with showing intent, though, because when your 50% accuracy radius is a couple of meters and you put a couple of missiles on a target that’s a hundred of meters of anything else, it’s hard to argue they were sidetracked.