You are taking a general comment personally. If City played a 15 year old and he looked good we all would be buzzing about the prospect. I don't need to look it up, there are examples of youngsters playing from a younger age and being fine (Rooney) and examples of others who don't, who may not reach their potential or may get injuries. Injuries happen though, countless top players who don't come on the scene as a kid get injuries and careers fall off. It's football.
Nurturing the right talent is key, look at us with Lewis. We will see, I don't think giving him a cameo at 15 will sway him, he will want to stay or go. Arsenal are heavy hitters in the transfer market these days and should you become dominant, the less kids will come through.