For the same reason that you never see a SWAT team breaking down a rich criminal's door to arrest him, even if he has body-guards or registered firearms, or is

For the same reason that you never see a SWAT team breaking down a rich criminal's door to arrest him, even if he has body-guards or registered firearms, or is accused of a violent crime. (Yes, I know, someone will find such a video on youtube to prove me wrong).