I really don't understand this line of thinking. Trent-Alexander Arnold is only 21 and has been the best RB in the world for 2 years (so from 20-21, he just turned 21 years old). Barcelona played a young Messi in their team and reaped the rewards by playing him in the first team, he becomes the goat. I just refuted the 2 teams you used as examples to NOT play youth. Note that they don't have to play alot of youth, but some? I think all teams can get some in assuming they have talent. Nobody is saying City needs a bunch of youngsters in the team, but to say we don't have one player who is a standout and can perform within this team is nonsensical, we even had 3 players (Sancho, Foden and Diaz) who were clearly destined to make it to top teams (and they already have) so the talent is there for us to use, we just have to make sure we don't lose them.