The display names option does limit your actual name length combined with pronouns, hexbear it's a separate field. I do appreciate the arguments against having it mandatory/integrated into the main lemmy. Here's the github post about it, the lemmy.ml mods agree with your line.

That said, on hexbear I see plenty of people keep none/use name and they've also have specifically agender ones like null/void, undecided, any.