If do not understand the intricacies of federal law or ‘newfangled’ technologies, and you are named to a powerful cabinet position, wouldn’t the prudent thing to do would be to hire a staff that does? Not understanding or being “careless” is not a valid defense. What she did simply should not happen. It certainly does not recommend her to be president.
She wasn’t careless. That’s a lie. She did it to hide her activities.