Why are the World Cup hosts well grouped? Aren't they all decided by lot? Please also specify the process answer.

Because the host has the advantage of home court, it will be tied with the other seven strongest teams and become the seed team of eight groups. And the host must be ranked first in Group A, because everyone wants to watch the host game in the first game, and there are many fans at home! Because Brazil is stronger this year, there is a gap in the strength of Group A. For example, in South Africa, the last host, the strength of Group A was obviously much worse, and Brazil was unlucky. In the second grade, the Netherlands was the strongest. Finally, the Netherlands and Spain were grouped together and eliminated Spain. If Brazil and the Netherlands are in a group, it will not be so easy for Brazil to qualify. Imagine: Brazil, Mexico, the Netherlands, Cameroon?