Divine testing and wisdom

قَالُوا۟ تَٱللَّهِ لَقَدْ عَلِمْتُم مَّا جِئْنَا لِنُفْسِدَ فِى ٱلْأَرْضِ وَمَا كُنَّا سَـٰرِقِينَ

They said, "By Allāh, you have certainly known that we did not come to cause corruption in the land, and we have not been thieves."