Those that keep questioning all these youth players need to understand our owners are Baseball guys. Each major league teams has several minor league teams. The Dodgers have seven minor league teams. They buy up these 17 - 19 year olds. Put them in their minor league teams and give them 2-3 years. If they keep developing, they get a call up to the Dodgers. If their development is not explosive, they sell them for still a very nice profit.
I believe this is the model they are putting in place with Chelsea. It is geared for Chelsea to get the cream of the crop and make lots of money on youth players being sold. It is a very cold blooded system. It really is not what club football was twenty years ago where a club embraces a player for their career.