Not just every family - every member(old enough and trained obviously) should have their own firearm.
Wife and I each have personal handguns, plus a shotgun and rifle.
Daughter has a handgun.
All three sons have a handgun and a shotgun minimum at the moment.
full disclosure - all my kids are grown and 2 are married and have their own homes. Two sons are still at home and in college.
We all enjoy going to the range as a family whenever possible.
You adhere to the old maxim...”No one NEEDS a gun of any kind..until the moment he/she REALLY, REALLY, REALLY needs one. Better to own the gun and NEVER NEED IT, than to fervently wish you had one.