The 'how' is key. Very important that the "short hands" begin as the torso/hip-engine pulls. Review the 'short hands' video. This is what causes 'structure' to be built along the forearms ... it is why folks speak of the bottom-hand/lead-arm finding the ball ... it is also why the lead-arm can be thought of as the 'swinger'.
The short hands video is great, thanks for that. In this video he talks about the cue "bottom hand thumb turning towards the ground", aka turning the barrel with the hands, which as you say builds structure along the forearms. How does this differ from what Shawn is saying, don't turn with your hands, turn with your forearms. IMO.. the hands and forearms work together