These guys play the same tour and the same courses, and they play them in the same style. In the 1980s and 1990s maybe the courses could be set up to favor the home side, but I think that's gotten harder to pull off anymore. How do you set up the course to suit Rahm, Hovland, and McIlroy better than Koepka, Scheffler, and Thomas? You'd have to really split hairs.