You continue to make stuff up....
https://www.football-espana.net/74932/neymar-im-number-10-dont-compare-me-lionel-messi
He's more of a 10 or striker than he is a wide player. He prefers to play centrally.
A) That's not even a skill set.
B) Our wide forwards don't track back nearly as much under Ole as they did under Mourinho
C) He'll be expected to chase and press wherever he plays.
D) It seems all other players cope fine with changing positions across the forward line without damaging their skills.
Even Lukaku, who's as stereotypical a striker as you can get, plays on the RW from time to time.
Teaching happens on the training ground. In the games you build experience, confidence and an awareness of the level you need to be at when playing against top opposition.
You don't know what his position will be in 2-3 years. He's 17. What proper position? You're talking like we're suggesting to take a player that's played as forward for 10 years and stick him at fullback.
Give your head a wobble