I wonder if there's a psychological benefit though. If someone states up front that they know something is just a nitpick, the author might be less likely to push back, and therefore it's less likely to end up in a bike shedding back-and-forth.
This and when an author wants to ignore it, they do. You don't need to justify your choice since the person is openly saying "I'm bikeshedding" to you.
This and when an author wants to ignore it, they do. You don't need to justify your choice since the person is openly saying "I'm bikeshedding" to you.