puttmad, i simply cannot believe you think this to be true. i'll tell a story then give my opinion, in a thread i have tried to not post in because i thought that sense would prevail. obviously not ...
there was a young Australian lad, around 19/20. he had played Aussie Rules and rugby to a high level, and was very physically strong in his upper and in his legs (thighs, quads and calfs).
he took up golf and had a lesson or two to learn the grip, set up and what not. he then proceded to play golf by using his big muscles to throw his arms around. he had no regard for where his arms went as long as his body pivot threw his arms on the ball.
call pure pivot controlled hands, pure swinging or whatever, he did not have any regard for where his arms and hands went and did. all they did, as far as he was concerned, were holding on to the grip and being "schlung"
he would hit 6 irons around 190-200. and this is about 10 yrs ago.
but the ball went anywere. he then had to create some other movements just to control where the ball was going. as a result he lost the efficiency from his pivot and big strong muscles. he ended up with very undesireable mechanics and hit it much shorter.
he then had a lesson with a very good teacher who trained him (i imagine) to monitor his hands and arms. he was then able to utilise his strengths (his physical strength), hit the ball as far as he used to, with control.
so after all that, whats my point. the pivot is the strongest part of your of body, with regards to golf. the reason you say "go throw a ball, and see where the speed comes from" that is because we all know how to throw a ball and dont have to think about the pivot. so we dont realise how much speed is being created by our pivot.
i was watching the olympics the other day and Steve Redgrave, Britains greatest ever Olympian with 5 Golds from 5 Olympics talking about rowing technique. he demonstrated having a bent arm when pulling the orr is week, as then you have to use arm/bicep strength. with a straight arm you can utilise the strength in your legs. now i know theres obviously differences between rowing and golf, but its a clear demonstration that legs and stomach muscles are much stronger and can produce more power than the hands and arms, without even starting to consider snapping then chain.
if you have a totally hand dominated stroke, imo, you will never, ever ever ever ever ever ever ever hit it as far as you could.
you will never ever ever ever ever ever ever hit it as far as you could if you lower actually have a 'passive' lower body/whole body pivot.