Yes, that's how the Focuspot works, by using the rangefinder in reverse. The light shines through the rangefinder and projects two dots on the target, and when they join together, the lens is focused. A laser is even clearer to read, and you can conceivably look through the viewfinder and focus with the rangefinder at the same time.

The Focuspot instruction sheet (it's probably available at somewhere) would show the photographer pointing the dots on the subject's chest, even though it used an ordinary flashlight bulb and not a laser. Just don't point a laser at anyone's chest at any mafia weddings.