I think the pros and cons are all covered, but I would take issue with not pointing your gun where your flashlight is shining. You SHOULD be pointing your gun where your flashlight is shining. If you're searching for someone you may potentially engage with a firearm, your muzzle SHOULD go EVERYWHERE your eyes go. You don't look first then cover the area with your weapon. If you do need to engage, it's too little too late at that point. No matter how good someone thinks they are or might actually be, action beats reaction every time.
Trigger finger discipline is key here. You cannot ensure that a person is a "friendly' until you identify them. If they are not a "friendly and they are not covered with your weapon, again too little too late.
Muzzle goes where eyes go, always, that's BASIC Room Clearing 101.