Why may “niʿma Zayd” be discussed as expansion?

Iṭnāb: Clarification after Ambiguity, Tawshīʿ, Repetition and Īghāl

• The praised referent is already explicit, removing all clarification
• A second statement cancels the original praise
• The one praised is specified after a general positive valuation
• The verb of praise is simply repeated twice