We live in a quasi civil society and anything else is a desired illusion. Carelessness, on the part of this women, as sad as this situation is, does not give your argument any credibility.
That one should fall on knife while running does not justify the banning of knives. That a child can start a car and back over a sibling does not justify the banning of cars.
Gun owners, knife owners, car owners do not have a right to endanger anyone anymore than legislation can ensure common sense and ban stupidity.
Sadly, our world is a violent place, from the constant threat and action of war to the pandemic use of drugs and the inherent violence of seller and user.
The scenario goes on to a failed education system, a failed family structure and more.
I would agree that guns are problamatic, but so are the assaults on good people.
When these on going, and seemingly increasing assaults deminish, then perhaps a conversation is needed and, I would think, welcomed by all.