Just who are these people who have secrets? Which people depend on the ignorance of the people around them to live their lives?
Are you afraid your wife might learn about your mistress?
Are you afraid your business partners (bosses, coworkers, corporate contacts, government regulators) might learn about your communicable diseases?
Are you afraid your religious associates might learn about your immoral activity?
Are you afraid your children might learn about your illegal smuggling operations?
Are you afraid your Amish friends might learn of your technology company?