People will tell you that the break-in process is needed for tool marks, etc. But NO ONE ever has that barrel scoped first, to see if it is a real thing, and needs addressed in their barrel.
So remember that line from the Stevie Wonder song? "When you believe in things, that you don't understand, you will suffer... Superstition ain't the way."

Fortunately, it isn't likely to harm anything. Just waste your time, cleaning components.
So as I have long said about "break-ins", Do what lets you sleep at night. What do you care what someone else thinks?