It depends

It depends on the golfer and their goals and capabilities. A junior golfer should make those neurological gains because it is fun and usually their swing works better. A beginning adult golfer or a golfer without speed should free up and learn a few key movements that create speed. The old way of thinking was to be still, swing easy and that will add more control. This is true especially when developing the eye hand coordination of hitting a round small ball off the ground from different lies. It is difficult for everyone. But I would rather a person with no speed free up and miss for a week, encouraging speed. Than have no speed and continue to hit half power decent shots. The swing works best when all muscles are stretched to the max and in coordination with each other. The harder you swing the better you hit it. Those guys that really hit it good are not swinging easy.