WO double hemlock
You mention golf. Equipment has to be approved. The equivalent of a jump cue at golf would be a wedge with no grooves, you can hit a ball almost straight up..,not allowed.Because it’s another tool on your Arsenal you practice and get good with. It’s no different then golfers having multiple wedges. It’s just the old pool players that destroy the modern game because they have no vision for the future because they are stuck in the past that hate it.
I like jump with the cue you’re playing with. Some jump cues were declared illegal.