It is a scary thought, yes, and sometimes, though not often, a reality.

I remember this quote from a tv show, "people's fancies do not get taken by that which is out of view."

People think the grass is greener on the other side because of what they see, but it's what they don't see that prevents them from leaving.

It’s a battle between desire and fear I guess. Well, not always fear. Sometimes it’s just a battle between desire and logic, or common sense.