A smooth fluid connection is essential to producing a smooth natural rowing stroke.
There is no "solid" connection between user and the moving water, simply an immersed paddle which dampens out any detrimental mechanical feel
Providing some "give" is essential for accommodating bad or developing technique, lessening the risk of injury.
There is no jerkiness or jarring which is often associated with conventional mechanical rowing machines making the exercise unpleasant
Only a smooth even load, kind to the body, and relaxing to the mind.