If you look at age, both Ronaldo and Messi seem to choose to give opportunities to younger players, to maintain regeneration in the team. Because we can imagine if both of them were called up to take part in the 2026 World Cup, but the coaches of the two teams put them on the bench, the fans would of course criticize the managers out loud. When the coach gave the two more playing time, they were no longer up to it. In conclusion, managers will go awry in taking action, I think that is very reasonable.
I think they also as players must provide opportunities for their juniors to be able to feel the atmosphere of the World Cup, because it cannot be denied that there they will gain a lot of valuable experience which later might motivate them to do even better.