They're real questions. Imagine a vendor selling a secure operating system. Problems arise when these decisions are made without consideration. And it's not always as palpable as the preceding example. Exactly what a particular security technology does, and exactly what it does not do, is just too abstruse for many people.
Security is never black and white, and context matters more than technology.
Different security technologies have important places in an overall security solution. A system might be secure against the average criminal, or a certain type of industrial spy, or a national intelligence agency with a certain skill set. A system might be secure as long as certain mathematical advances don't occur, or for a certain period of time, or against certain types of attacks. Digital threats The world is a dangerous place. Muggers are poised to jump you if you walk down the wrong darkened alley, con artists are scheming to relieve you of your retirement fund, and co-workers are out to ruin your career.