Just some unsolicited advice for you: your comments read as antagonistic and arrogant, and are neither going to get you useful information nor make you any friends. If you're genuinely curious about how this is possible, why not ask good-faith questions about their experience, and then make a judgment quietly to yourself? Instead, you're invalidating them from a position of ignorance. Even in other cases where you might be right, you still look childish and insufferable.