I believe it has helped in terms of being beneficial in preventing many unwanted pups. With equal dedication, we can promote ways and means of teaching people how to teach their dogs to behave in ways which will make them an enjoyable addition to the dog owner's life. This approach could make changes we perhaps can not imagine at this time. Armed with information on how to teach a dog how to behave appropriately, and to be able to do this quickly could make a radical difference in the statistics quoted above. Certainly, we are all aware that there are libraries available to us for dog training books.
Most pet shops offer books on dog training.
Understanding human nature, we can well imagine the dozen or so excuses one could create about not having the time to get to the library, or someone not wanting to spend the money, or the time hunting, for a book on how to train dogs. In addition, most people really believe, if they think about it at all, that they already know how to train a dog properly. It is not until sometime later when problems arise, these same people may become aware of the need for some help. It is also highly likely the problems which do arise could easily have been avoided with some early obedience training. Notice once again that the manufacturer of the all the afore mentioned products does not expect the buyer to chase around to find a set of instructions, or directions, on how to operate their product.