Thats your problem. It is intended as a COMBAT drill. Its origins are in combat. Hell, its even named for a conflict.
In CQB training i was taught this, except it was a Double Tap COM then immediately line up for the headshot and take it if necessary. And, of course, move appropriately while doing this. And typically it was a situation where the 12ga was empty with tangos remaining.
It is absolutely not meant for civilian use and would probably result in excessive force for a LEO. But that is the difference. In Combat you are actually trying to kill people, in a home invasion you are trying to use enough force to stop a threat.
Exactly the issue, then why are people teaching it?