You don't point a gun at anything unless you already know you're willing to shoot it. You don't point your gun with a flashlight on it at something to see what it is.
I disagree. A quality light will illuminate enough of an average household room that you need not point it AT the dark figure, but maybe at the low ready, or toward the corner 30 degrees away with your finger off the trigger. That will illuminate enough to allow you to determine friend or foe, and identify a threat or non-threat.
I do also have, and am trained to use, the FBI flashlight technique. But I prefer to have a free hand for defense, opening doors, turning on lights, and grabbling if necessary, grabbing something like the phone, keys, a small child if needed, etc.
If it would fit in my holster, I'd carry it on my carry gun. But the bulk is prohibitive. And when I'm out in public, I'm generally in well light areas, and can't imagine much scenario where I can't identify a threat versus non-threat. I'm awake and alter and have situational awareness.
Different from that is Home Defense. Nightstand gun has light. I expect it to be handy. If I'm at home, I may be awoken and need immediate light.