birly-shirly
New
Do this experiment -- keeping a pencil in both hands try to draw 10-centimeter lines on the wall with extended arms via their movement trying as much as possible to replace line on the same place. Then bend both arms in elbow, tie your humera to the body and try to draw these lines via body rotation. You will find that in the latter case lines are drawn in a much more consistent way. Hope this will be selfexplanatory addendum to your question.
Cheers
If your life, or your livelihood, depended on your ability to draw neat 10cm lines on a wall - would you really use EITHER of the techniques described here? Or would you rather rely on the sensitivity and fine motor co-ordination of your hands and arms. Most golfers have a hard enough time putting the club squarely on the ball - and I'm never really convinced by attempts to deal with this as a mechanical problem, rather than a co-ordination problem.
I don't believe that you can eliminate the timing requirement for good golf. It might be possible that certain movement patterns REDUCE the timing requirement - but I think the timing requirement remains huge for any golfer. Find me a good golfer who doesn't worry about tempo and rhythm. Re-read what Hogan said about the importance of his waggle (and of NOT grooving it, but adjusting it to every shot) before arguing that Hogan's timing ran on automatic.
Fine control of timing is, I believe, a reasonable explanation for how good players can manage their ballflight even whilst they talk in terms of the "old ballflight laws".
It's my hunch that the sooner the average golfer learns how to manage their timing, rather than chasing (bio)mechanical models or a certain "look" - the sooner they'll start to improve.