That's exactly my point, all three cases you mentioned.Moves like this later turn out to be stupid most of times yes. But than, one can never know what the future brings. So all you can say in a case like this is, good luck to the young man.
We've had players before joining top teams. Even in Milan there was Sandro Bloudek who was though of the next big thing here in Slovenija. Where is he now?
We have a couple in Inter at the moment too, by the latest news they are doing pretty well for their primavera, but who knows what will it be latter on.
Than there was Semler in Bayern. We all know how that turned out.
I don't remember any 15 year old Croat players going abroad, Croatia is not in the EU so the players are restricted. The last teenager to leave was this kid named Tadic who went to Leverkusen, but within one season he was back in the HNL. A few months ago apparently an 18 year old from Osijek declined to join Liverppol (but you never know if this is true )Well, if I remember correctly, Croatia also had a fair share of 15 year olds signing for big club football schools, no? Does it mean Croatia has gone low as well?