Trudeau is a testament to that fact.
I would suggest that human beings are like automobiles. Their engines (brains) have plenty of horsepower, but doddering old fools are driving them.;-)
Trudeau is smart enough to know that stupid people will continue to believe in him and not be cognitively-capable of processing his contradictions even as he oppresses his own citizens; just like the Chinese government does to their citizens.
He truly is the Canadian Obama.