These Serie A comes up with an idea lets put limitation for non EU transfer (the most complicated rule one) to improve their youngsters, but in the end their youngster development is left behind by the likes of Spain and England. Why ? because that makes their competition locally/more EU and limit them in attract high quality talents from Africa or South America, add to that their culture to not really trust or rely to youngster make that condition worsen
With Africa nation players those Italian youngsters need to push their stamina a level above to compete, with south American they need to improve their technique and skill a level above. they can get money by selling those and those are more valued and easier to develop, with more money from their sale they can built the best facilities that improve all of their youngster more systematically. They just make their life difficult