i think for me i want to develop a stronger top hand and which allow me to be stronger on the puck. I find i have a weak top hand and can't move the puck as quick as i like when i have just the top hand on the stick while i use my other arm to defend a check. I do also see pros are using weighted stick not just for stickhandling and shooting as well. much like a weighted bat for a baseball player before hitting the mount.