Jim,
Obviously this could ping pong back and forth until eternity.
I'd started to look up links to people and companies within the industry that recommend against the use of plastic rods, then figured, why bother?
I'm not going to change your mind & you have as much of a chance of changing mine as you do talking me into parachuting again.
(slim to none & slim just left town)
Good luck to you and I hope you never run into an "Oh crap" moment.
As I admitted above, in my younger and dumber years (~ 40 years ago) I tried an electric drill and a wire brush myself, so, your method isn't anything new.
Over the years, I've read and heard that plastic cleaning rods can attract/trap abrasive debris.
The people that said/wrote this were people that made a living in the firearms industry, so, I tended to believe what they said/wrote.
Getting away with something once twice or even a hundred times really doesn't amount to much.
Look at how many people waddle out of their favorite watering hole after having a few too many and make it home just fine.
Must be tens of thousands of them a week.
Just because they get away with it doesn't mean it's not something safe to do.