Soft hands is what its all about. Why? Because tense muscles are useless in the golf swing (also in tennis).
I love seeing these 6'4", 250 # bozos at the range who swing out of their shoes and either hit banana balls 50 yards off line or finally hit one straight and its a low worm burner that goes 150 yards, drops like lead and rolls 30 yards.
Then, some lean, supple stringbean shows up and swings like he's falling asleep, then hits shot after shot like it came out of a canon-275 yards straight down the middle.
Soft hands, yes. Smooooth and easy swings, yes. Ball go far because of mucho lago.
Why? Lag is a function also of wrist hinge; poor wrist hinge=poor lag. How do you get wrist hinge? Swing smooth to allow the wrists to hinge with soft hands. Funny how one thing leads to another but all comes back to the one thing.