In the fact that somebody who is not experienced handling and firing a weapon in a stressfull situation is more likely to hurt themselves or an innocent bystand

In the fact that somebody who is not experienced handling and firing a weapon in a stressfull situation is more likely to hurt themselves or an innocent bystander, I think you are correct. I would think that, beyond waking up to find you have an intruder, that having a gun in your house is not going to to you much good if you have a voilent intruder. If somebody decides to bash down your door in a violent range, you are not likely to have the instant access to a weapon that would be required to deal with the situation.