There is no such thing as a "Dangerous weapon", There are only "dangerous people".
The pen really IS mightier than the sword , if you are holding the sword, and some one like Mike Janich has the pen.
The main purpose of FA on the Sturm Gewehr derived "assault rifle" was to suppress mass attacks and for countering ambushes.
Then the Russkies realized that if it worked well against mass attacks it should be the bomb if used to launch mass attacks.
To address FQ's great question, which I will simplify as "is there any real benefit to the civilian in having a FA rather than Semi auto version of the same fire arm.
As a non LEO civilian I would say it depends on the weapons purpose. If it is to impress the other guys down at the range , OF COURSE FA is better. Duh !
In the real world, not so much.
Going to put a 3 round burst into Bambi,( or a feral hog where you are) ?
Second, and most important, how does the ammo get to where you are firing ? (Every old grunt out there knows where I'm going

)
You tote it

I'll admit to being prejudiced by the Marine Corps tradition of AIMED Fire, every cook and clerk is a trained rifleman, but I still have to ask, when you want to send word to some one do you mail to their home address ?
Or do you send 3 or 4 copies to the right street and hope one finds him ?
The only time FA is practical is if you want to kill every thing in front of you. Not very common for most of us.
But they are fun

Edited to add:
Wow I just finished reading the thread, (yeah I know

)That was a great answer CR.
And FQ seems to have captured the essence of my post, 3 round burst turns it into a
heavy 10 rounder.