So after Barcelona had had so many disastrous seasons, he came, if i am not mistaken, Xabi and convinced the management to go into debt to rebuild the team and it worked, if i am not mistaken, even if partially.
I think he has a good vision although maybe Flick is better
Are you mistaken Xavi for Xabi? Asking because Xabi never coached Barcelona rather he is the new coach of Real Madrid that was signed from Bayern Leverkusen. It was Xavi that coached Barcelona in 2021 before he was relieved of the job after some challenges. The current coach of Barcelona is Hansi Flick.
Furthermore, I don't think a coach have the right and power to convince the management of a club to go into debt because no one loves debt. The job of the coach is more of ensuring that the team wins matches and not interfere with certain things that should be the decision of the board and shareholders.