The difference between leaders in dictatorships and in democracies isn’t so much in the average time they rule, but in the variability in the time they rule. Yes, not ageing wouldn’t help someone like Bachir Gemayel who was assassinated after two weeks in office, but it would probably have helped a leader like Stalin. So I care more about the variability of how much no-ageing would help dictators than the average. But still, I agree ageing isn’t the main bottleneck on dictatorship.
The difference between leaders in dictatorships and in democracies isn’t so much in the average time they rule, but in the variability in the time they rule. Yes, not ageing wouldn’t help someone like Bachir Gemayel who was assassinated after two weeks in office, but it would probably have helped a leader like Stalin. So I care more about the variability of how much no-ageing would help dictators than the average. But still, I agree ageing isn’t the main bottleneck on dictatorship.