Many years ago I was giving and narrating a demonstration with a few of my dojo mates at a ‘Japan Day’. An Aikido group was on before us and explaining what they were doing in great detail. “Your attacker grabs here so you spin around and place your fingers precisely here and press with only three of them, not all four and break their balance at 37degrees to the front before flipping them over their heads into the distance…” etc you get the idea. When it came to our turn, the first thing I told the audience, somewhat in response to the previous demonstration, was that Iaido techniques are kept deliberately simple because in the heat of combat, with adrenaline pumping and ones mind racing regardless of the amount of training one does and, of course, one‘s enemy not necessarily behaving as one expects, it is easier to modify simple techniques.
Complex explanations of technique are probably hyperbole.
Yeah it's often mental somersaults (or cartwheel wristlocks, right
@drop bear ?), and it's born from the lack of live application. Aikido's founder would never show the same technique twice in a row and a key concept of his was "takemusu aiki" (spontaneous martial [technique] born from union of opposite forces within the body). In short, go in with proper body structure and strike, then stuff will happen. Which is in line with the simple approach you recommend.
Well to be fair, I recall reading about Japanese swordsmanship (I’m sorry but I cannot remember the source, this was quite a few years ago) and got the strong impression that great attention is paid to the little details that go into correctly gripping the sword. And drawing the sword. And cutting with the sword. And re-sheathing the sword. I remember discussion of close examination of the severed tatami mat for evidence that the blade might have been turned a micro-degree from perfection when the cut was done. That really stuck out in my mind as later I would receive training in Chinese sword methods within my larger kung fu practice, and we never discussed it in such detail. Grab the sword. Cut the bad guy. Done.
If you want to become a swordsman (as opposed to "I'm gonna learn some sword as part of a more general martial education"), it makes sense that you devote more time to study the proper way to hold your tool (why does this sound weird?). Correct gripping allows you to use the sword in an optimal way, just like correct positioning allows you to punch better. If you hold the sword with your pinky and ring fingers, you align your body structure so that you can put your weight into your swings. This transfers into empty hand: if you hold a wrist/forearm/whatever like you hold a sword, you can "swing" with your bodyweight. That's why we train with the sword in aikido (otherwise it would be totally pointless as not even the founder was a swordsman).
Yet some aikido teachers can lecture you about how the art all comes from the sword, hold their hand straight "because it must be a sword" but grab your wrist with their fookin thumb and index.
Naturally there are intricacies to the art otherwise anyone could pick up a sword, slash it around a bit and call it Iai and this is probably a later development from the crude but lethal slashings of conscripted farmer-soldiers (ashigaru) to the Yagyu clan teaching swordsmanship to the shogun.
This reminds me of something interesting that you may know and that is right on point here. In pre-modern Japan, some swordsmanship schools emerged during periods of peace and used elaborate movements. Those schools were criticized by members of more grounded styles as being "flowery swordsmanship" (kaho kenpo), i.e. made up stuff that's too removed from the reality of the battlefield. It's the pre-Fonzie version of the expression "jumping the shark". This is an old debate.
Interestingly, during the same period, there were also criticisms of the commercialisation of martial arts schools (= McDojos). Moreover, there are records of prominent swordsmen such as Yamaoka Tesshu (1836-1888) criticising schools that didn't spar because you couldn't learn how to fight from drills alone. We haven't invented much.