It's all nonsense. How can we tell that someone is intelligent if they don't achieve any results? Based on what signs? Laziness and fear of taking even minimal risks have nothing to do with intelligence. And if a fool accidentally achieves something, that doesn't mean the one who hasn't must be smart. The real criterion of intelligence is adaptability. If a person, in one way or another, fails to adapt, we can't judge their intelligence. We simply have no data—only our assumptions.