Training can be good. You can invest in training, but the hiring process in the first place has to be good enough that you're getting people who have a judicious attitude.
A person can sit through training all they want and then, at the end of the day, walk out of training and keep doing the same thing. If we don't improve the hiring process and if we don't have a reasonable complaints process, nothing's stopping people from attending as much training as they're given and not absorbing it.