Yes it is, I have never heard that before today. So I guess if someone breaks into your house in the middle of the night, you have to hope that you can openn the safe in time to defend your family.
Yep, that's the hope.
Maybe ask them nicely to wait while you find the keys for your safe or try and put in the three digit tumbler combination under pressure? They don't want you to defend yourself in this state, they want you to call the police and wait 15 minutes while you watch your family members get beaten/abused and you shot. That's the preferred method in Massachusetts.