Wrong, PlayStation!
An intruder at night has the upper hand, most often. The first shot is mainly to safeguard your family, by confirming your target BEFORE you kill. If you have a better way to flash the room with light and respond quickly, then do so. I would much rather shoot a hole in the ceiling, unnecessarily, than to accidentally shoot a family member or a drunken neighbor who crawled through the wrong window, for instance.
Obviously, if you can clearly see your target, there is no need to flash the room.
Accordingly, at night, the chances of committing a wrong-kill in the dark with the intention of protecting your home are about fifty:fifty. So your first shot is also to protect yourself and ensure a good shooting.
It doesn't really work with a handgun muzzle flash, unless you're shooting a magnum and in that case shooting through your ceiling is a very bad idea. Use a shotgun.