In Seattle area, freeways got variable speed limit signage a few years ago. The system uses sophisticated traffic flow optimization techniques to maximize average speed of all traffic. It changes the current speed limit on a stretch of freeway. This is a relatively simple system for humans to follow - but I don't see any cars (including myself) obey the variable speed limit - we all go by the standard 60mph limit. I have not seen any law enforcement because presumably it is next to impossible to give a ticket based on a number that keeps changing. As a whole, the intelligent traffic system is complete failure.

Even if a AI president is in place, providing policy direction to maximize some agreeable set of end goals - the humans around the president would not understand the nuances, nor effectively able to / want to implement the policy given their own agendas. I feel that systems is bound to fail.

Now if only the AI president is able to do behind-close-door deals with politicians and special interests groups, some of the the policies might actually get implemented. But the end goals could shift pretty radically in that scenario.

I am having a hard time visualizing a scenario where an AP president would be effective / useful.

Maybe a human president could use an AI advisor to get data-driven arguments to support his/her policies.