A statement in praise may emphasize an agent's disposition to act rather than introduce one narrowly specified object.
«فُلَانٌ يُعْطِي» can present generosity, while «فُلَانٌ يَصْفَحُ» may present readiness to pardon. In such utterances, the agent's quality, not the identity of a particular gift or forgiven person, is central.
This construction does not necessarily express praise; another verb could convey blame or a neutral description. Its rhetorical effect depends on lexical meaning, context, and what the listener already knows.