Claudius There’s very little difference between how much a good player and a bad player will score a miss a specific shot.
Disagree with this bit. Players who have good composure and ball striking technique will convert chances better. On a game by game basis it may not be statistically notable, by over a season it's the difference between someone who scored 30 goals for you and someone who scores 15-20.
Nunez has zero composure, he doesn't have the ability to slow it all down and get the basics right when shooting on goal. His only hope of becoming prolific is if he develops the right instincts.