It is true that almost every club will stop playing for the World Cup. Due to which the performance of the team players is likely to change later. Some may play brilliantly and some may lose performance. Such changes will have some impact on clubs or tournaments.
The change in performance for each team depends on the condition of each player and that will also make the competition more exciting after the world cup. But the team and the coach must have prepared a bit of an unusual strategy in dealing with this because this season there must be a world cup which makes every team's match in the League be postponed
International matches of course greatly affect the stability of the club, because of course the scourge of injuries that players get in international matches will hurt the club in the end, that's why many clubs may be reluctant to let their players go to play when the national team plays, I also think that later there will be a lot of influence which is obtained by the team after the world cup is over and sometimes the team will feel the adverse effects that affect the condition and performance of the team in the league or champions league when the core players are tired or injured after playing in world cup.
But there's also a good side to it and it's not always the World Cup that results in something bad for the team, because with the World Cup there will certainly be a new name that might improve because of a good performance at the World Cup.
Also, if the core players in each club can play well and not get injured in the World Cup, then these players will still have a stable performance and or even better when playing at their club after the World Cup.
So in this case I think we should also be able to admit that there will always be good and bad impacts, and we can't just judge from the bad impacts that might occur. Because for me, playing for the national team is a good thing and all players want it although indeed, there will always be concerns for their clubs but that can't stop players from wanting to play for their national team.
After all, there will be a recovery program for the players, which of course will still be good for keeping the players fit, so no big deal about the World Cup