The point that I am trying to make here that people seem to be missing is that a wrist guard is a device to increase your scoring potential because you are lacking enough fundamental development and correct technique in your game. This allows you to compete at a level higher than you really should be able to. Yes it is in the rules, but this was more of a question of opinion and this is mine. I am with Jason as well, the last time I used a wrist guard and pretty much every time I have used one has been for the purpose of cutting out ball reaction.
Some have commented that they have small frames, they don't believe they are strong enough etc. That is the idea behind developing yourself. I can however fully understand the use of a wrist guard if suffering from a physical problem again, as a means to being used as a training aid until suitably fit again to compete without one.
All other sports listed such as football with strapping, more protective and supportive and every player can benefit from it, boxing, wrist strapping and plaster under the gloves is injury prevention and the same with gloves, everyone wears them, it doesnt give any particular player an advantage, swimmers and suits to go faster, again, every swimmer can benefit from using a suit, car racing, sorry but do u expect them to use peddle power like the flinstones or old cable or drum brakes that would last 1 lap if lucky. Most technology in a race car has an origin or some similarity to normal road going cars, but again, all of this technology is available to all. Just about all sports have restrictions that prevents one team, car, swimmers, whoever having an advantage over others.
If bowling was to be a sport reduced to equipment that only everyone had access to or absolutely required and a players natural ability, then a wrist guard wouldnt be included.
And don't let George fool you, he may not be able to bowl a totally similar shot without the use of a guard, but the amount of time and energy he has expended on his overall game coupled with having a simple game with little error would most likely have given him similar results anyway and I am sure if he had spent that time allocated to developing a shot without the use of his robo cop arm, he would still be successful due to the other areas of his game.