It's not even about like or dislike. Some people dislike the UK, but I imagine that few feel threatened by the prospect of having to cross its border. It's an easier sell to make someone come to the country despite whatever they don't like to attend a big event. But with the US, who knows at this point? The system had been shaken up so much in the last year that there's no telling what's going to happen to any given entrant (especially someone from one of the "disfavored" countries), or what the rules are going to be like tomorrow. It's not preference, it's preference combined with fear.
FIFA's comical attempt to bribe him with a bauble might be a lot about them trying to persuade him not to do this, among other things that will mean nobody will want to attend games.
Considering the amount of people who always go to the World Cup yet is skipping the US-specific events of 2026, I'm not sure it'll be so interesting after all. Will more or less be like how Las Vegas seems to be today, a former shadow of itself.