Well, just because it's safe to be used sparingly doesn't mean it's safe to be used repeatedly. Enemas and laxatives are available on the market, and are considered safe, but only if used sparingly. They can destroy your digestive system if not. This is true for many products.
Plan B is just that...a backup.
Trying to make some sort of argument, with incredibly flawed logic, is just hilarious. One has to give credit to your fellow posters who just say "I don't agree, morally, with birth control." They at least made a point, from a moral perspective, and aren't hiding behind some crazy logic based in non-facts.
No one will challenge your arguments here, so I'm not surprised.