rsvman2 Dan Martin says the exact opposite. So does the Zen golf guy.
Whatever thought works for you is fine. I don't think there is one idea that is universal and works for everybody.
Yeah, there's many ways to swing. Different swing theories etc.. They all work. You just have to find which one is best for you.
Years ago there was an epic debate at a PGA meeting between Jim Flick (hands and arms) and Jimmy Ballard (big muscles of the body).
Marcus of ZEN Golf does say that the swing is a double pendulum though. It has to be to get a forward low point. He gets very good results with his exaggerated weight shifts etc.. Very knowledgeable guy.
But again, all the hands and arms guys like Manuel de la Torre go back to the teachings of Ernest Jones. Ernest Jones lost a leg in WWI. He had to figure out how to play golf with one leg.
His teaching philosophy was 'club focused' and not 'body focused'. You swung the club with your hands and arms and the body reacts to the swinging of the club.
Manuel's father was friends with Ernest Jones and that's how Manuel was introduced to that method. I've found for me that the body reacts to the hands and arms philosophy works best for me.
Opposed to Ballard's idea that the big muscles of the body i.e. legs, torso and shoulders control the swing rather than the smaller muscles of the hands and arms.
For me the hands and arms swing was more relatable to all the other sports I played. Basketball was my main sport. I dribbled and shot the basketball with my hands and arms and never once thought of what my body was doing.
My body just reacted to what my hands and arms were doing.
I also think whether you're a hands and arms focused golfer of a body focused golfer it helps greatly if you're blessed with fast twitch muscles.
Which most of us are not. This is why the average swing speed of a male golfer is in the low 90's mph.
The body focused swing is the dominant method taught today. George Ganka's is a very popular body rotation swing guru right now for example. For me though focusing on the body doesn't work.
The swing happens so fast that if I concentrate on what different parts of my body are doing it results in a nightmare.