I have never, nor have I heard folks say that a person using a Judge/Gov. doesn't need to aim.
What I have said on the matter is that it gives the user more of a potential for a stop vs a single projectile.
This is kinda what I run into when I say it makes it more likely to hit something vital. What I mean is, that unless you are VERY good at hitting moving targets and able to keep a cool head, chances are your 9mm slug isn't going to hit the heart. You might hit a lung, zip through without hitting anything vital, or go low (gutshot) or high (headshot or miss), but there seems to be this assumption that if you can hit the bullseye on paper, you'll shoot a bad guy in the heart every time.
With every pull of the trigger on most pistols, you have one slug going into the BG. With ever pull of the trigger of the trigger on a Judge, yeah you might not exactly hit dead center where you're aiming (but as we established above, dead center where you're aiming isn't always the heart), but you get 3-5 chances that one of the projectiles will hit the heart.
Like I said, I can see the appeal, and I think the .410 is one of those that offers an interesting platform over a conventional pistol round, but if you select the proper load, I don't think you'd have a problem stopping BGs within the range that you can put that load on a torso.