Couldn't you? It seems like if you were skilled enough you could figure it out by the reactions of various players in the photos with more than one or two people in them.
Trying to triangulate based on where players' eyes are looking rarely works. In many cases, the goalie is looking in a completely different direction than where the ball is. I guess that's why they're getting scored on.
Don't forget that the ball can come very fast and the keeper will need a split second to adjust. In other cases, the kicker can be masked by another player preventing the keeper to see the ball until very late.
