People know there is a world outside their basements, and that world contains lovely things like ladies/gentlemen, scrumptious foodstuffs, marvelous beverages, serene sunsets, and super-cool eclipses of the moon. Still, people remain inside and live off of pre-packaged food, and why?
Because it is safe. Because it is sufficient. Because there is no need to go any further than necessary.
Furthermore, the world is full of murderers, thieves, cheats, and liars. And some stuff can give you food poisoning and hangovers.