Why did Allah Almighty set an example for Himself through His servants in Surat Ar-Rum, even though He is perfect and humans are imperfect?

Allah presents parables in the Quran for reflection and understanding, due to their profound impact on the acceptance of the divine message. The parable in Surah Ar-Rum (verse 28) which states: ﴿He presents for you an example from yourselves: Do you have among those whom your right hands possess any partners in what We have provided for you so that you are equal therein; and do you fear them as you fear yourselves? Thus do We explain the verses for a people who reason.﴾ is a parable Allah set forth for the polytheists to demonstrate the falsehood of their polytheism. There is no resemblance therein between Allah and His creation; rather, it is a matter of "analogy by priority" (qiyas al-awla). If humans do not accept their servants as partners in their wealth, then how can they ascribe partners to Allah from His creation and His dominion?! Allah possesses the highest example, and He is transcendent above any partner or deficiency, and He is greater and more majestic than to have a partner.