Precision air strikes, as in video games, were considered "cost effective" even back in the days of the Vietnam War. Minimum casualties on "our side", maximum on their side. Did it work then? No.
Now, those who don't want to learn from history are repeating the same cost effective war making. One inevitable consequence is alienating those you want to be on "our side".
If air strikes can kill your own people, imagine what air strikes do to those who are not your own comrades?
All reports indicate Afghan civilians are at least as fearful and resentful of US induced "collateral damage" as that of Taliban or Al Qaeda. Read this latest from BBC here.