Disgruntled sovereign individuals getting together and forming things called 'communities' and organisational bodies called 'governments', which sometimes collectively decide to do things for the "greater good" (never thought I'd have to use that horrible term, but there you have it) even though some individuals may suffer a personal loss....
Oh, such a shame... You had me right up until "greater good." People can group. People can collectively decide things. But if they force their decision on even one dissenter, that's tyranny.
You and your "objective morality" again...
When the majority wants something but Myrkul opposes and wants something different, that's tyranny... Sure, why not. But who's the tyrant?
They're welcome to do whatever they want. Among themselves.