I understand that. You asked about why some people don't keep score so I told you why I don't keep score. The actual number or the change in the number doesn't interest me. It only tells me if I was better or worse. I like a more specific breakdown. What was I better or worse at?
Say I had two rounds where I scored 54. On the first one my driving and approaching was right on, but I missed all my putts outside of 10'. On the second one my driving and approaching was just OK but I hit all of my putts inside of 30'. What I decided to practice next would be very different depending on which round I had, but my score would be the same. That's how I decide on what to focus on for next time but I leave out the part where I have to either write down or remember a number.
Now that I think about it, when my wife asks me how I did disc golfing I usually say something like, "My driving was pretty good but my putting was just OK," or maybe, "My driving was just OK but I hit a lot of long putts," or more realistically, "Bad."