Stupidity can win for a moment, but it can never really succeed because the nature of humans is to seek freedom. Rulers can delay that freedom, but they cannot stop it.
They're talking about things of which they don't have the slightest understanding, anyway. It's only because of their stupidity that they're able to be so sure of themselves.
Someone said: "I have been prejudiced against myself from my earliest childhood: hence I find some truth in all blame and some stupidity in all praise. I generally estimate praise too poorly and blame too highly.