SingmeasongSong
Right Sometimes
Because you’d take a huge risk of destroying a great talent like that. Its better to let him go up step by step, eventually letting him play cup games and mature first. Goalkeepers of his age rarely break through at top clubs, they do at small clubs where there is less pressure.
Look at Svilar, one of the best young goalkeepers in Europe at only 18. Benfica gave him a chance in the CL and this happened:
Hardly played after that, will take time to build him up again. We want to avoid that.
Well, I get your point but aren't there enough counter examples, like Donnaruma and Lafont ?
At least your analysis of Joao screams a strong personality which should help him to do it right away. You can get those confidence knocks irrespective of your age.
If a player is ready to do the trick should always be judged individually, based on talent and personality.