You're actually trying to link jump cues and whether or not US players have won a WC lately? You've got your opinion, BELEIVE me we get it. Not everyone shares it. DerbyCity is probably one of if not THE most anticipated/attended tournament there is and they don't allow them. Are you going to call Diamond and tell them you won't attend the next one 'cause they don't allow jump cues? The reason(s) that US players are behind the rest of the world has nothing to do with jump cues. Lack of junior players and too many bar-box events maybe but not any so-called 'backwards' opinion about jump cues.
did I say anything about attendance. You're trying to convince me that because one prestigious event doesn't allow them then that's some kind of reason not to attend. Of course players are going to show up to a mecca of pool regardless of whatever special rules for that event they want to implement.
It's a numbers game. The less skill and experience that a player has to bring to bear in pressure situations the lower the odds that that player will succeed in pressure situations. The rest of the world competes using jump cues so they are very very good at using them in pressure situations and thus when presented with jump shots they are more likely to succeed than an opponent with less experience.
These same players however can also kick as well as any other pro so there is ZERO disadvantage for them to play in an event like Derby. In other words, BECAUSE we go out our way to handicap our players in many of our events we insure that the amount of jumping experience under pressure that they get is less than those in the rest of the world. And that means that it plays a part in why our players don't succeed as much as they should or could in my opinion.
Yes, BACKWARDS, the opposite of FORWARD. 250 years ago pocket billiards was played with and on equipment that no one would accept today. In that span we have seen the introduction of better cloth, better instruments (cues vs the mace), tips and ferrules, chalk, rubber cushions, and precision ground matched slate along with better tables in general. A jump cue is merely a continuation of that progress. It is a tool that is nearly, if not actually, perfect for the task it was created for. It is available to every player of any skill level and represents a skill to be mastered.
Modern jump cues add a ton of shots to the game. Basically almost any shot that can be made without one can be made with a jump cue adding the additional difficulty of the jumping action to the shot. Jump-safe, jump-kick, jump-pocket(pot), jump-masse', these are four shots where the addition of a blocking ball has made the shot much more difficult. However without a jump cue most of the possible shots with a jump cue would be nearly, if not completely, impossible.
Just like chalk adds a ton of shots to the game. Don't believe me, then go play someone equal to you in speed for a ton of money and you don't get to use chalk on your tip.
In every aspect of this sport the equipment has improved and for some strange reason ONLY IN AMERICA there is a vocal minority of "get off my lawn" types who jabber on about the "integrity of the game" and such nonsense while NEVER EVER EVER calling for the game to played with the equipment from 1837.
My advice, get over it and realize that jump cues are part of the SPORT on the WORLD STAGE and handicapping your players by disallowing the cues and then abusing them with guilt-trips about the "integrity" of the game and "you're not a man if you don't kick" stuff only holds them back.
A well rounded player practices and masters all aspects of the game and if owning a jump cue means that a player neglects to learn kicking then that is PURELY that individual's problem. Barring players from using jump cues is a systemic problem that harms the players in general.