This is not a standard used to judge a great player - Maradona, Ronaldo, other Ronaldo, Cruyff, Platini, Zidane, Henry, Zlatan, etc.
This is absolute trash. As a former youth player (at a small club) who never made it to more than a youth team, I can't tell you the number of times kids aged 12-14 have come out crying when they have been told that they are no longer part of the team. Where is the club loyalty then?
Barca invested in Messi because he was talented, disciplined and performed ... it was not out of charity ... He owes them nothing!