Weapon mounted lights are a very specific tool. They are a CQB room clearing tool and that's about it. They should never be used for searching or looking over areas where a threat has not been determined.

If I were on a SWAT team, I'd most certainly have one. For home defense, I don't want one because I want to search with my light while holding my pistol in a safe direction; I have kids and dogs in the house. Both of which can at times make random noises in the middle of the night. I don't want to EVER point a gun at one of my family.

So normal flashlight used in the normal way with the gun pointed safely away. Once a threat is identified, then handgun and light come into alignment.

For concealed carry, again you'll be using the flashlight very independently of the pistol.

I just think for 99% of civilian use the weapon light is more liability than asset.