@Sentient Tree I agree basically with everything you said. It's well understood that democracies are, simply put, better able to correct themselves, and the fact that you need to keep the people happy enough to not vote for someone else is certainly a powerfull incentive.
Basically a monarchy/benevolent dictatorship (there isn't really that much difference between the two in my opinion) can only work with an extremely good AND capable monarch/dictator.
The problem is that, EVEN if you get one, AND he has good and capable supporters... sooner or later he'll die.
and EVEN if he was good enough to replicate the situation for his heir... sooner or later there will be a failure.
And then the whole castle of cards will fall.
That's without even considering how a monarchy/dictatorship is simply more fragile, and if you kill the monarch/dictators there is likely going to be a civil war, ESPECIALLY if there is no clear heir. As it happened here.
my protest was really only on the way you phrased it. "Things don't have to be realistic, we have multiple monarchies that actually take good care of their people for crying out loud. "
Even taking mlp as an example and avoiding RL discussions... how long would Equestria have survived if, at any moment in the last 1000 years, Princess Celestia was killed or went mad? I'm not even considering the whole "moving the sun" situation, I HAVE to believe there is a contingency there, or that the spell is not actually complicated, just very draining, and unicorns would either find it or rediscover it. Maybe it's not even hidden, it's just that Celestia has a closer bond and is capable of overwriting anyone's attempt as long as she's alive.
Even if the sun-moving spell was lost another race might be able to do something with their own magics (maybe a zebra ritual or dragons pooling their strenght together, or a Changeling queen souped up on love) or Discord comes back and at least keeps everyone from dying.
eh, rambling a bit. short version: I agree with you, I just didn't like the way you phrased things. In the long term a monarchy will nearly always be worse than a democracy for its people.