Experience with burnishing lifter bores?

Bewy said
Maybe I am missing something? I am assuming this is a used block that gave 000s of trouble free miles of service. Why would lifter bores need burnishing when lifters haver been operating [ lifting & rotating ] without incident for 000s of miles.

If that's the case, why do any of them fail to rotate?

You do you but I'm not going to take a chance of failure.