Do you compete in any competitive, precision oriented shooting sports?
Do the rifles you compete with have a top tier barrel brand in them? A Bartlein, Krieger, Mullerworks, Brux, etc?
Do you always win or always place in the top 3?
See what I mean?
I understand your point, not sure you understand mine or maybe just don't want to.
Using a barrel from a reliably known, generally accepted as accurate, source simply removes, or minimizes, one of the biggest factors in shooting small & consistent groups.
Obviously, the ones you mentioned are the cream of the crop................usually, but there are plenty of barrels that are consistently "good" just below that pinnacle.
Such as the Douglas that the OP has, WOA, Rock Creek buttoned, & Criterion to name a few.
So if the stated goal for a given shooter is to shoot small groups consistently, ie, 10 shots, <MOA, then it surely behooves one to start with a barrel considerably better that a Radical, BCA, Stoner etc.
Yeah, you might get a winner with one of the bottom feeder barrels, but the odds are HIGHLY against it. Why go to all the other efforts involved to reach the goal with a bargain basement barrel.
It's rare that one will make the goal with a low end rifle............not that it can't happen, but the deck is stacked against it.
In the case of the OP, he doesn't have a low end barrel, not a pinnacle barrel either, but a known, generally good barrel.
YMMV
MM