But you can know that you don't know it all.
Thirty years ago I belonged to a club on the Eastern. Shore of Maryland. It wasn't very good. It was dead flat, with round greens that had very little break or slope. It was wall-to-wall green with lots of trees. I have a friend that learned to play on that course and had never traveled for golf.
A couple of years ago, I brought him to Ballyhack, where there is a lot of elevation change, forced carries, few trees, greens with a lot of movement, tight lies in the fairways, and shots he has never hit. He hated it. It was only "missing the clown's mouth." It made me nuts. But what else could I expect? His knowledge was severely limited. He thought every course should be similar to his own: flat lies, lots of trees, and straight putts.
He didn't know what he didn't know but thought he knew it all. I have played an embarrassing number of courses, and I figure I only know 20% of what I should.
On the other hand, he loves the course he plays. So he doesn't need me to tell him he shouldn't love it.