You might as well ask why knives are sharp enough to cut you, why hammers are heavy and blunt enough to destroy things, or why guns fire bullets so quickly that you can't react to them. These "behaviors" are not strange side effects, they're inherent and necessary.

You can't trust an effective AI any more than you can trust a sharp knife. If somebody asks you for one, it's probably not a good idea to throw it across the room at them. You will have to figure out how to get it to them safely.