Use of arms to stop home invasions often leads to the arrest of the homeowner. In short, society and its institutions favor the criminal element. You may use a gun but you will find little support.
Depends upon the state and the local DA.
After having been robbed and shot in 1975, and still carrying a bullet near my spine, I WILL use them at my discretion.
If you don’t believe that, ask George Zimmerman.