1. The World Cup is played in more than one city, and chess can also be played in the same venue. If the Swiss wheel is used in the World Cup, it is impossible to determine the opponent and match number in each round, and it is necessary to draw lots many times, which will greatly increase the cost.
2. The World Cup is very long, and chess may be completed in only one day. In the World Cup, players need enough rest time. If the Swiss wheel is used, the team must get the lottery results before leaving for the venue, which is not conducive to the rest and recovery of the players.
There are many teams participating in the World Cup. If the Swiss ship is adopted, none of the 32 teams will be eliminated, which will lead the organizers to spend more manpower and material resources to take care of those "weak teams", which will undoubtedly greatly increase the operating costs.
Fans don't like this competition system either, because they can't leave before drawing lots. Whether the fare is mentioned or not is a question.
To sum up, considering the actual operation and appreciation of the World Cup, the Swiss wheel is not suitable for the World Cup competition system.