In a word - Nah! That being said (written), what is logging good for? It's a learning tool, just like in your student pilot days. If it helps you, then do it. Successful sailboat racers log obsessively- every practice sail, every race.
We're not racing, but may I suggest some of the same practice techniques? Don't have to log them, just do some. One easy exercise , and constant source of amusement are Man Over Board (MOB) Drills. I usually use a seat cushion or an old hat - toss it over board, turn around and pick it up. Upwind, downwind, reaching, etc. Another simple, but useful exercise is to get yourself on a set course to a landmark (tree, building, flagpole, etc onshore), then lash your tiller (bungee it), and keep steering towards the mark using your sail balance and bodyweight. See how small changes affect your course, observe your leeway (how much you slide sideways). Both of these exercises will teach you a LOT about your boat and your skills. But there is plenty of fun to be had too. My little lake has a submerged tree in the middle, usually with herons perched on the branches. I'll spend an hour or so "sneaking up" on them. How close can I get before they fly off? Trick - approach from downwind, but don't splash too much.. . Anyway, if you want some more ideas:
https://sailzing.com/sailing-practice-techniques/One of these days, when I'm down at the coast with steady winds, I intend to do some real logging. Set a course over a measured distance (between two buoys) and log what happens with various sail adjustments (time it). The intention being to really measure and record what works, what's my "first gear," "second gear," etc. I have an instinctive "feel" for what works now, but it would be nice to have some proof. If you're ever on a competitive race boat, you'll see every control, almost every rope, marked 1,2,3... etc. Those marks are part of a "recipe" for every condition... "Upwind, 10 koit wind, accelerating.. Use main halyard 5, Jib in haul 3, Traveller -2.." and so on. All from hours of practice and logging. So that's another use for logs, even for us non-racers. But you need a steady wind and a way to measure your speed. I'm in no hurry
Best,
Tom