That is sometimes the answer. The majority of people who shoot - even those who know how to shoot straight and hit what they're intending - are not trained to shoot in stressful situations. You'll have a gun, you'll be able to point it, but the question is will you be level-headed enough to shoot the person threatening people without making yourself a bigger target and endangering other people.
Even if someone has a gun, there are other ways to try and take them down - that is safer for everyone else involved. A person without extensive training on how to shoot in chaotic conditions is rarely able to safely and/or helpfully waving a gun around trying to save everyone else.
The Daily Show illustrates perfectly why this run on guns and concealed weapons permits actually can make us unsafer:
Jordan Klepper: Good Guy with a Gun part 1
Jordan Klepper: Good Guy with a Gun part 2
talons / Rake your talons / Link
This entry was originally posted at http://merhawk.dreamwidth.org/547675.htm