I don’t know about that. If she asked them to leave her house/property at any time during the arguement and they refused, she may have been justified in getting her gun. If that is the way it did go down, she should have called 911 as well just to cover herself.
I don’t know that this is what happened, just saying that one woman faced with two or more large male furniture deliverymen could be intimidated enough by something that was said to make her believe that she needed to protect herself. From the article it looks like this was within the confines of her home and she did not point the weapon at anyone.
Unless she was in fear for her safety, she had no reason to arm herself. A gun is not a magic wand with which one gets others to do their will. At least, not legally.
TC