Lots of good answers. I think Ben and Jud probably come closest to why I feel the way I do about Andy's thoughts.
For me, it comes down to limited resources, those being primarily time and money. I'd rather play with the people I want to play with, and golf on the courses I really want to play, than add courses others think I need to see to broaden my horizons.
I play golf for a lot of reasons. Ranking or rating isn't one of them, won't likely ever be. I don't need to see certain courses to feel like I've seen it all and learned whatever from it.
I'm not just a Doak BB, I'm one of the founding members. In some cases, literally. But guess what? I have little or no desire to play Rock Creek CC or Tumble Creek, from what I've seen. I'm sure they are great courses, but they're likely not what I'm looking for in a golf course, at least in the sense of committing my resources. And I did commit a good bit of my resources to a dream on the other side of the world. I did it because I believed in Tom and I believed in Greg. I'm not sorry I did it, though in the long run, it was probably better for me that my investment was returned.
When I get down to Texas, I'll be playing WP and WP only. When my time is up there, they will be trying to drag me to a car while I struggle to hang on to the porch. (Someone might want to reinforce those beams, btw.)
Do I regret the courses I've played and thought were only so-so? Not at all, I was playing golf, and in virtually every instance, enjoying the company of good friends. I don't think they really added a great deal to my thinking about golf, either, but maybe they did add in identifying what I don't like.