In college, several of my best rounds came after I topped the first tee shot and hacked it all the way through the first hole. It seemed to shock me into settling down and playing well from then on and perhaps kept me from getting complacent, which I have a tendency to do. Conversely, bad rounds often came after nailing the first tee shot down the middle. But maybe that's just the nature of golf. Now I've lived long enough not take 2 or 3 good holes for granted and know the wheels can come off quickly. And there are gonna be bad shots. You can use them for immediate feedback to get back on track.
Stoicism has a lot to offer golfers, imo, in particular, its distinction between external (uncontrollable) and internal (controllable) goals. Winning a tournament, beating your buddy or even making a dead straight 4 footer is not completely in your control. All you can do is what you can do, play your best, get the ball started online with the proper speed, etc. Seems to me that golf is a battle between the process and the result. The trick is to stay focused on the process that will produce the result you want. But the genius of the game is the trappings suck you into caring too much about the future outcome. You don't want to hit your first shot OB in front of a lot of people. You do want to hit a good one down the middle, or at least in play. But in order to do that you are going to have to stay focused on the process of hitting the ball, staying in your pre-shot routine, staring at your target, keeping good balance, hands low, clear the left side, finish pretty, swing your clubhead at least 123 mph, etc. For me, that's all mental because I already know how to physically do those things, except for hitting 123 mph. Now it's more a matter on not doing the bad stuff.
I think Eric Clapton said about learning the guitar, the first 10 years you learn what to play and the next 10 you learn what not to play. I think golf is like that. At first you learn what to do and at some point it becomes an endless process of simplification.