A learner may memorize many terms and then use them to belittle other people. That is contrary to the intended effect of beneficial knowledge. The phrase يُفَقِّهْهُ فِي الدِّينِ points toward meaningful comprehension and responsible application. The more one understands, the better one can recognize limits to one's knowledge.
Example 1: Listen carefully to a different scholarly view and understand its evidence before reacting.
Example 2: Do not turn a short hadith extract into an immediate sweeping legal verdict.
Religious understanding should be joined with practice, humility, accuracy, and concern for the benefit of others.