Dozener Imamate Contradicts This Verse

To the 12ers who believe in Imamate the powers Imamate comes with, how would you interpret this verse ?

قُلْ لَا أَمْلِكُ لِنَفْسِي نَفْعًا وَلَا ضَرًّا إِلَّا مَا شَاءَ اللَّهُ ۚ وَلَوْ كُنْتُ أَعْلَمُ الْغَيْبَ لَاسْتَكْثَرْتُ مِنَ الْخَيْرِ وَمَا مَسَّنِيَ السُّوءُ ۚ إِنْ أَنَا إِلَّا نَذِيرٌ وَبَشِيرٌ لِقَوْمٍ يُؤْمِنُونَ {188} [Pickthal 7:188] Say: For myself I have no power to benefit, nor power to hurt, save that which Allah willeth. Had I knowledge of the Unseen, I should have abundance of wealth, and adversity would not touch me. I am but a warner, and a bearer of good tidings unto folk who believe.

Of course, in the mainstream view we are told that Imamate is superior to all Prophets except the seal of Prophethood. So with this in mind how can we interpret this verse from a 12er Shia point of view ?