you can do this same thing with any qb, I know, I used to do it with romo, yes he missed open guys too.
Thing is a qb can only look at one guy at a time, he isnt up in the sky like your camera, so it it different perspective and 1 guy at a time.
The guy has to be open or good to throw to when he looks at him.
When looking at the deeper guys, he is not going to see guys in close who may be wide open.
The only way to be like the qb is let the film roll no stopping it, and look at 1 guy at a time and even still your seeing it from the sky view.
with no one about to smash you, no noise, and nothing in front of you.
When dak looks at a guy he may not be open, he looks to next guy and first guy comes open but he wont see him.