The Not Aiming comparison is a red-herring. It isn't the point and I guess if no-one else will I'll say something at this point...
You DO have to aim a shotgun, but as a shotgun has a spray (say 10" at 5 yards), first, you are more likely to hit your target and, second, effectively with a single shell than with a .223 -- TRUE.
You DO have to aim a shotgun, but as a shotgun has a spray (say 10" at 5 yards), first, you are more likely to hit your target and, second, effectively with a single shell than with a .223 -- TRUE.