I know aversive dog training increases dog stress levels and affects the relationship with its owners. There is no discussion that aversive training is uncomfortable for dogs that is why it works. ALL dogs learn through positive reward based training - all dogs trained this way are less stressed.
If you are interested there are a lot of studies you can research to give scientific evidence to show how dogs brains change when aversive training is used.
Your dog has NO choice when wearing the collar, She barks and something unpleasant happens. Your argument on not wanting to stop her barking is odd as that is what you have paid money to do by purchasing the collar.
I do not want to stop dogs barking I want and do change their emotional state so the do not need to bark. Aversive training does not do that it just causes sensory discomfort if the dog does bark.
Most aversive training techniques, based on punishment (so smacking, water sprays, choke chains, prong collars etc. – anything that will expose a dog to an unpleasant or painful stimulus) aim to stop the unwanted behaviour as soon as possible. If they are strong enough (read: painful/unpleasant enough), they very quickly achieve the result – the dog will stop barking/lunging on the lead or chasing birds if beaten/shocked/yanked whenever he attempts to do so.
Everything seems to work perfectly well, and the problem can be “fixed” relatively quickly, but there is a catch.
Firstly, just because your dog is not reacting, i.e. you can’t see the outward manifestation of his emotional state, doesn’t mean he is not experiencing fear, anxiety, frustration etc. You managed to suppress the behaviour, but not eliminate the motivation for it. Your dog is still fearful/frustrated of what he was initially in the same sort of situation, but is just afraid to show it for fear of being punished – this means the motivation for the behaviour will eventually manifest itself in an alternative way, which can be equally, or even more problematic than the initial problem.