I don't think a lot of people understand why Hart is told to put a lot of his kicks to the touchline.
Years ago, when kicking wasn't much of an issue, before the back pass law, most goalkeepers would just routinely boot the ball as far they could, straight down the middle and let the forwards fight for it. More often than not it was won by the centre halfs and even if the forward got the flick on, it would usually end up been picked up by another defender or their goalkeeper.
I can remember been at Derby one year when Peter Shilton was adopting the tactic now used by City and I heard a bloke say with amazement, Shilton is actually passing the ball with his kicks and not just hoofing it.
What Shilton was doing and what Hart now does is kick the ball flat so if it reaches its target, the player has a chance to control the ball, with the defender still behind him and not just hope for an aimless flick on to nobody, which happens more often than not with a big, high hoof down the middle.
Of course when you are aiming for a target a yard or two from the touchline, you are going to over hit some and give a throw in away. But a throw in to the oppostion in their own half is not such a bad offensive position when you have time to squeeze up and close down the opposition before they take it. And it is definately preferable to giving up possesion in the centre of the field, which happens a good percentage of the time from a lump down the middle.