I feel like it would be fair to let the teams that host have some advantage but also not give them automatic group stages as well. Give them some higher chance to be qualifying for the position, I do not know what would be the chance, but let them have a higher chance and that would be lovely but after that let them also have a potential to be not there as well.
That complies with what is stated in the FIFA rules and providing an automatic qualification opportunity could give an advantage to the hosts who have been preparing for a successful World Cup run. After that they will determine the fate of their country through matches and whether or not they qualify for the next round is largely determined by the quality of the players they have.
However, it's always better to have the host team to play so that you get to see the full might of a world cup tournament. Not sure how much USA fans care about football, they have a different type of football there, so maybe it won't be too many fans but I am sure all the people around the world would love to go there if they can, it's the land of the free, and will be better.
The United States does have other sports besides football, but football has also developed rapidly there, so that the enthusiasm of the people there is also great about their team competing in the world cup, let alone being able to give satisfactory results. The world cup is also a concern for many people in all corners of the world, apart from football activities and there are many other things that can benefit the host because it might talk about the huge flow of money during the world cup process going on.