They've played Bethpage twice in the history of the tournament. #2 was a completely different course than the last time they were there. Oakmont was the same this year after they took all those trees down. And the PGA plays Baltusrol, Whistling Straits, AAC, Valhalla, etc every five or six years. I think it's just attention span by the time the season is winding down and the tournament is played in the heart of vacation season, summer, etc. if people watched, they'd know the courses just like they do the Open regulars. And short of someplace like Pebble or signature holes, how many holes do you really remember on the courses? I know I don't remember them when they return six years later.I agree with you but the rotation is a bit loose for the PGA and they work more unknowns in. I'm much more familiar with the US Open rotation courses. Pebble, #2, Bethpage, Oakmont, etc. I don't really like seeing them play new courses and the PGA gets off the grid a bit.
I'd like to see both tournaments move around more, but that's a personal preference I know not a lot of people share. I'd love to see each grab maybe three or four that they keep in rotation and then work in a new one every other year. That way you get to find a new gem like Bethpage. You get to see an old private course like Merion that you'd never otherwise lay eyes on or great public ones more people have played. Go play National Golf Links, Burning Tree, Bandon etc. find more municipal gems like Bethpage that the average guy can afford. I realize the logistics prevent some of these courses but there's dozens of amazing courses that people never see. I'd rather try something new than every five years see Pebble again. I can watch The other tournament they play there every year if I want.