I think you can read about anything on the internet to back up whatever position you choose to take.. so do whatever you want.
For me, to keep copper fouling to a minimum in a custom barrel, I'll do the shoot/clean procedure outlined above. Hell, you have to sight them in a little anyway and my cleaning method doesn't damage the throat, bore or crown....and it scratches an itch for me.
If your shots are under a reasonable 400 yards you can do as little care or as much as you wish and still get the job done. Half the deer-killer-barrels out there are rusty pitted junkers and they work every time within the ranges of the shooter.
All depends on your level of expectation
Zeke