My wife is a competitive swimmer. She wore the RZR suit at a meet a few years ago before they were banned from competition. She swam record times for her age group, and posted times that were near what she would do when she was in university, and she was 39 at the time. The suits are ridiculously expensive, and only last a few races. She said they were an unfair advantage against people who either couldn't fit in them (they aren't one size fits all), or couldn't afford them. She's gone back to a faster suit, but not quite as fast as the RZR.
There were drivers that manufacturers made that had a COR of .860. The PGA/USGA tested them, and banned them from competition. They were allowing for longer drives for golfers. Professionals were getting more distance than ever before.
There was a new hockey puck design that had raised dimples on the flats, near the edges. It made for smoother passes and less tumbling pucks. It also increased the speed of shots by about 10%. The design was rejected by the NHL, as they were concerned about maintaining the integrity of the game.
Sometimes, things get rejected to maintain the integrity of the game. Am I a fan of the jump shot? There are times when jumping the cueball can be used to play shape. I think that a playing cue is a playing cue. Unless you've lost a tip, or something has happened to your cue, you should play with one cue. If you want to carry a break cue, so that your playing cue doesn't absorb punishment, then use a break cue. After that, I see no needs for shot specific cues. If you can't make the shot with your player, learn how, or get a different cue that suits your playing ability. Sacrifices are made in every single sport, with regards to equipment. Pool should be no different.
Great if the governing bodies of those sports deemed those items unfair for the sport then that's their call.
our governing bodies, the ones that count, have ruled on jump cues 20 years ago. The point is moot at this point because they are allowed in world competition. Any promoter or room owner that bans them is handicapping their players against the world's elite players.
That's the bottom line.
And as mentioned previously, different "regular" cues have differing "jumpability". You could be the best full cue jumper on earth and I can make you look like an APA 1.5 by switching your cue. The cue i hand you will have been used to win multiple world championships and you won't be able to jump anything with it.
That's the dirty little secret about full cue jumping - while it's clearly a skill, not all cues are suited to the shot and so promoting the idea that a player is restricted to the cue that they start a game with will only lead to homogenizing playing cues until all of them have a roughly equal amount of "jumpability". Players will be forced to compromise and accept pool cues that don't play the way they like just so they are handicapped by an inability to jump when they need to.