This Zohar gives us profound insight into an important aspect of the relationship between humanity and the Creator. Hashem desires our active engagement in the divine decision-making process, in a sense encouraging us to "intervene" in His decisions. Hashem does not want us simply to observe the hardships and suffering present in the world with indifference or passivity, and not even with quiet acceptance. Instead, He invites us to establish a dialogue with Him, to advocate for the manifestation of His mercy and compassion in our lives.
Even in circumstances where the world is deserving of punishment or hardship, the Zohar teaches that Hashem provides subtle cues, urging us not to remain passive. Rather, we are encouraged to intercede on behalf of those afflicted, pleading for His compassion and grace.
With this insight, we can now revisit the verses in question from a fresh perspective. In describing the moment that Hashem decides to share the impending fate of Sedom with Avraham, the Torah is explaining Avraham's subsequent behaviour, thereby teaching us a valuable lesson. Avraham understood that Hashem was not just informing him of the situation so that he should be "in the know". Hashem was inviting him into a dialogue. Avraham realised that Hashem was looking for an advocate, someone to intercede on behalf of humanity's welfare.
This serves as a powerful lesson for us as well. It teaches us how we, in our lives, should approach challenges. It calls us to engage actively in תפילה ותחנונים, and mainly in לימוד זכות - finding merit. Just as Avraham took the initiative to approach Hashem and plead for mercy, we too are taught to reach out to Hashem and to invoke His compassion.