"should't crew especially F/O be able to judge if building or ANY OTHER OBJECT is that close or not ?"
Captains, how many of you, having asked your F/O "clear right", actually see the right hand ear (area) of your oppo when he says "OK"?
F/Os, how many of you, having asked etc, see the left hand ear (area) of your oppo when he asks you "clear left"?
Unless they are ex-military, most flightdeck appear to have a neck restriction when it comes to lookout, especially on the ground.
Try it next time you operate, and then wonder why?
