You may be right! And probably if I actually sat down and wrote it out in an actual scenario I would find myself writing more specifics to the situation and less the kinds of things I mentioned above. Like if the prompt was "Alfred gives Tim advice about Bernard" or something I might not even notice if Batman didn't come up, because that's going to be about parts of their lives that aren't really about Bruce at all.

And certainly there are people who don't really write with much interiority at all where it would be way less of an issue, and that could still be good fic.

But with the DNW in play, even in a situation that doesn't need to be about Bruce I would still feel like I was tiptoeing around the existence of Batman in their lives and why in this specific fic they aren't thinking about him even in situations where they generally would.