Agree, who really benefits from Mbappe's presence if he is really going to Real Madrid, Real Madrid or actually the players because Real Madrid is Real Madrid with whatever squad composition they will never be a mediocrity team in Laliga or in European competition, even though they can't become champions in Laliga or also win the Champions League in certain seasons not because they turn into a weak team but which team can always win every season? none because the strength map of a league or tournament will always change because a team that is performing poorly will certainly improve itself so that it becomes stronger in the following season.
Many great players actually need a club like Real Madrid because if these players continue to develop themselves then they will definitely be able to win titles at this big club, which is why players will gladly accept when they get an offer from the Spanish club, and next season they will perform better to challenge Barcelona for the title, so no player is bigger than the club he defends.