I’m no fan of death, but death (by natural causes - age, sickness , accident) has been how different generations have gotten rid some of the worst despots.
"Science progresses one funeral at a time".
I'd prefer to solve the despot problem in a way that doesn't involve me getting dead.
Several countries have managed to not have despots for long periods.
I reckon people will start caring about their despots if they expect to live a millennium under the despots' boot
If you were expecting to live a much longer life, people might grow more fearful about the consequences of speaking up against a dictator.