That's not true really at this age, what he needs is to be getting meaningful minutes though. He could quite feasibly get those here as backup to a clear first choice.
Our current situation of having a bunch of middling strikers is the worst of all worlds though, as they're all clearly going to be picked ahead of the youth, yet none of them are good enough to make a case for being clear first choice.
It's good that RKM is only a loan and so will be removed from the squad for next season with no messing about, leaving us with a decision to make over Richi/Solanke. Franky I wouldn't be against selling both, bringing in the best striker we can attract, and then having Lankshear as the understudy, might as well keep Dane around to cover injury too.
Totally agree on the non-rotation of recent years. Even Spence only got his chance when there was no other option and the injuries had already struck.