Lasers on firearms are mostly a waste: they add weight, bulk, and another battery/gadget to fail without solving your real problems. They're hard to see in bright or cluttered scenes, can get knocked out of alignment by recoil, and often make people chase a dot instead of mounting the gun naturally and using the sights. Most don't cut through the cartridge smoke after the first shot, so the dot disappears when you need it most. Also, the point that it is accurate is specifically relevant to the distance of the target, which changes if the target is moving. There's like a million reasons why lasers are a dumb idea.

At typical shotgun ranges, you're already pointing, not aiming, so the laser gives a false sense of precision while you still have to manage pattern and target ID. A good light plus solid fundamentals beats a laser on a shotgun every time.