Most of the times people start their political career to defend the poor, the defenceless or the oppressed, but sortition might also help the other side of the power spectrum.
Deciding takes its toll. A ruler cannot contempts everybody and a given decision will always be unfavorable for some people. This portion of the population can vary both qualitatively and quantitatively from decision to decision. An elected ruler tries to please the majority, but sometimes the « best » decisions are the unpopular ones. One measure could please A and displease B, and the next one could do the exact opposite. Leaders need therefore to justify their choice.
Ruling is also tiring. And not only from the stress to displease. A leader needs to be 24/7 available in order to solve issues occurring randomly. Charismatic rulers often brag about how little they sleep. But the lack of sleep leads to serious health problems. It is said that some leaders sleep six hours or less per night, another kind of animal also sleeps the same amount of time: goats.
Two animals sleeping six hours per night
Photos from wikimedia and https://www.veterantv.com/suicide-rate-among-goats-reaches-peak/ creative commons licence CC-BY.
Mechanisms to rule out a leader in a system using election are brutal. Destitution only occurs in exceptional and traumatic circumstances. I see it as essential to think about how a leader will leave peacefully when they arrive. The rotation using election is hardly thought as a « natural » and smooth process. It is as if this mode of selection inherently pick the best that is a immutable characteristic. Destitution would be in this case a profound failure.
Rotation seems logical and smooth in a system using sortition. Even if rotation intuitively seems a good idea to get rid of selected people unfit for office it can also diminish the pressure on the designated leader. The power MUST rotate in a system using sortition. Stern contradiction becomes possible without too important turbulences. This enables non-violent revolution. In a nutshell, sortiton protects leader from themselves and from the strain coming from power.