This is a fake story. Intruders will take away your gun and use it on you. I know, cause Sarah Brady told me that's what will happen.
You are quite correct. Don't they know that statistically a gun in the house is far more likely to harm its owner than protect her? Poor Dustin (sob!) - a mere 20, yet another "child victim of gun violence."
(BTW, the last isn't even an exaggeration; this guy does qualify as a "child victim of gun violence" according to the VPI and the Brady bunch...)