The text identifies استهجان التصريح بالاسم as another motive: naming someone openly may be stylistically undesirable in a particular setting. A relative description can refer to the same person more discreetly. The purpose can be courtesy, tact, or a contextual preference, not necessarily secrecy.
Applied example:
«الذي أساء إليك اعتذر» — The one who wronged you has apologized.
The clause recalls a known event while avoiding the person's name. The discussion is thereby framed through conduct rather than explicit naming. A relative phrase need not be a metaphor merely because it avoids direct naming.