In “The Field of Cormallen” (Book 6, Chapter 4), Gandalf brings outfits for Frodo and Sam to wear to the celebration.

‘I do not wish for any sword,’ said Frodo.

‘Tonight at least you should wear one,’ said Gandalf.

What does “should” mean in this context? He certainly doesn’t need it for protection.

The other option is as a sign of status, but everyone in attendance knows what he has accomplished, he has already been placed on the King’s throne and ‘praised with great praise’ and he has forsworn using violence.

Why would Gandalf offer him even the slightest pushback over a fashion choice?

Edit: hope I’m not being too argumentative in the comments. I appreciate everyone’s input!