Being able to play in the CWC is still something special especially for 40 years old player. Also, he can help FIFA to boost the ticket sales, too. Even though CWC is not as big as the world cup, but it still being considered by a major trophy after FIFA world cup.
I see it as Ronaldo's strong reason to keep his existence even in the top competition of club's level. There's nothing wrong for him to wish he can play again in CWC.
Yes, it is not wrong for Ronaldo and I am very happy if Ronaldo can return to play in Europe and participate in the Club World Cup but unfortunately I doubt there is a club that wants to recruit him because as we know Ronaldo is the player with the highest salary in the world and only Al Nassr can afford it and then we also do not know whether Al Nassr will extend his contract because his contract will expire at the end of June and I will understand if Al Nassr does not extend this player's contract because his salary is very expensive. Back to the topic I think no one dares to recruit this player even if he has to cut his salary it is possible if his intention is only to play in the CWC anyway he is also very rich money should not be an important thing for him because his love for football makes him not want to retire soon.