I think that is unfair, Moses is a perfect example of someone coming through the loan system to push their way into the squad. In addition, this year, Moses, Chalobah, Aina, and RLC have all come through the Academy or the Loan system. Technically, Courtois and Terry could fall into the same category which means 6 of the 24 first team squad players, or 25%, have either gone through the loan system or come through the Academy.
Personally I feel that the following players have the ability to do the same, whether they do or not remains to be seen:
Christensen, Musonda, Traore (Most excited about these three), Ake, Brown, Baker, Abraham.
The rest are either too young to tell yet, or I don't see getting to the level required to be a CFC first team squad member