First of all Jase is right, bit off topic, wrist guards have their uses, everyone knows the pros and cons, and my personal opinion won't change, yes they are legal to use and have been around for ever and day, BUT they do allow someone who for whatever reason cannot cope with bowling without one to compete at a higher level than they otherwise would. Its not cheating or even close to it, but kinda similar to teeing off the ladies tee in golf.
Yes, not everyone bowls seriously, people enjoy their bowling, and obviously if you don't regardless of skill level, then it is time to find something else to do.
People keep mentioning that technology progresses, but wristguards have nothing to do with keeping up with technology, their major function is to provide an aid to someones performance and they are not something that everyone requires, or can take advantage of for their own benefit, you strip a swimmer back to bare basics, they have a pool, and the goal is to get from one end to the other quicker than the bloke next to you, the fastest guy will win and this doesnt change regardless if everyone in the pool is wearing a suit or not. Wristguards have nothing in common with this. You take the same scenario with two bowlers one that wears a guard, one who doesnt, same ball, same lane etc, what do u think will happen to the guy who is used to relying on his guard when his technique goes out the window?
I will also use good ol Jez as an example, poor blighter was 30kg wringing wet when he was a junior, had the best concave chest to eat cereal out of and at the time was using a wrist guard that prob weighed more than he did, not to mention there was very little ball action going on. Not too much has changed in the incredible hulks stature, but due to time spent, developing his shot, strenghening and practicing with the help of Doc, he throws a great shot. It really just depends on what you want to achieve out of the game and what you want to spend your time doing.
Frank, if you had possibly watched Amanda a little more, you would have seen her bowl without a wrist guard quite a lot, practice, league, tournaments, there is very little variation in her shot with or without, the only assistance from the 'goose' is a bit of stability which as Jase has pointed out a few times, could really be developed with strength. The longevity may not have been there due to operations to remove cysts, but I really don't think anything really would have changed in terms of results.
In terms of girls strengths and supposed weakness, generally yes they throw very weak shots, but this is more due to lack of technique, lack of development and poor coaching, and this is a whole different topic.
There is no reason why anyone, if they wanted to dedicate time for development of their game to lament their size, strength etc.