I would think a number of paddlers 'flick' too much such that a large proportion of the energy is used to 'flick' the paddle out of water. Usually, it contributes to even more splashing of water and the action doesn't help move the boat. I would believe that 'punching' in the blade fully before pulling would reduce the splash. Also, i notice there tend to be this sweet angle of entry which produce the ideal front catch. A paddler have to quickly discover this.
We have to understand that the paddle is most effective when maintained as vertical as possible when 'pulling'.
Of course its easier to say than do during fast stroke rates ie. charging. One have to be constantly mindful of one's own technique, stroke by stroke. As they say every stroke counts.