Why do you think that is?
Other clubs have won the league and champs lge with kids as part of their squad? Why is it different for City?
No one is expecting the team to be full of kids, but with the players we are producing they are more than worthy of a squad place. There seems to be also this argument that players who cost a significant amount of money are immediately better or having a collection of the best players also makes the best squad.
Kane outperformed ade and soldado last year. Coquelin was better than the vast majority of defensive midfielders. The same arguments could have been made for not giving them a chance last year. Both clubs have benefitted from playing them