Did the vizier really wake up the Calif?

Here it says that in the Sokoto Caliphate: > “The classical vizierate is based on some verses from the Quran. > > يَفْقَهُوا۟ قَوْلِى وَٱجْعَل لِّى وَزِيرًۭا مِّنْ أَهْلِى هَـٰرُونَ ‎أَخِى ٱشْدُدْ بِهِۦٓ أَزْرِى وَأَشْرِكْهُ فِىٓ أَمْرِى‎ —Quran > > So people may understand my speech, and grant me > a helper from my family, Aaron, my brother. Strengthen me through him, > and let him share my task >"The vizierate in Sokoto was based on the > Abbasid Caliphate version of the position. Shaikh Uthman dan Fodio's > book, Bayan wujab al-hijra, justifies the existence of the position in > the caliphate: The first pillar [of a kingdom] is an upright wazir > (vizier) over the wilaya who wakens [the king] if he sleeps and gives > him sight if he cannot see and reminds him if he is heedless. The > greatest catastrophe which could befall the wilaya and its subjects is > to be deprived of good wazirs and helpers. One of the requirements of > a wazir is that he should truly be benevolent and kind-hearted towards > the people.” Would such a ruler with such power & responsibilities wake themselves up on time or was this really a part of the Islamic job and state function of the Islamic Vizier!?