i guess for me I'm thinking more in terms of longer-term data analysis...I haven't spent time testing it, but I'd be willing to bet that the distribution curve of a random set of data (with certain parameters) and somebody's individual golf scores would be virtually indistinguishable.
Now of course I could have a day where I'm struggling with something very specific that I know I'm doing wrong...a problem I sometimes have is keeping my weight back and hitting behind the ball with my irons. I might have a day where I'm struggling with that, and plus maybe I'm really tense when I'm putting and missing short putts, etc. So my bad score that day isn't random, I know what the problem was. But I know I'm just going to have days where I struggle with something like that, and I'm going to have days when it seems more effortless. Which day is which to me is what is more random.
And if I know, statistically, to expect to have days like that, I can just understand it's just a part of the game, and still enjoy myself.
For me often if I've had a couple really good rounds in a row, I'll start expecting to continue to do that well, and get really angry and discouraged when the bad round I should have been EXPECTING finally comes around. I guess this all comes down to having realistic expectations for me. How happy we are is usually a measure of how reality played out relative to our expectations.
That's not to say you don't continue to learn, practice, work hard to improve, take responsibility, etc. Back to the casino analogy...you're working to improve your edge! But, the edge plays itself out over the long term and, to me, it's not the best idea to put too much weight on any individual result. And obviously it's not random if a pro scores a 65 and beginner scores 120...this is more about just our own personal one set of data/scores. But hopefully I've gotten my idea across, and I understand some will disagree.
I think the randomness comes from the variables that conditions bring into play. Beyond that, it's up to me to steer the car. If the wheels come off, it's due to my own lack of skill and/or preparation. This is why I am putting in work to get better.
I just liked seeing the pictures, and comparing them with a really poor video I made of myself hitting a couple of shots. Immediately, I noticed that my hip rotation going back is good, but that I seem to stop close to square at impact, instead of being open.
I know... I know... I need to post a video. I need to get a set-up that will let me record it properly.