When one becomes an adult and moves out of the nest, one either
a - Chooses to stay near his roots
b - Chooses to re-locate
In other words, if you didn't choose to leave, then you chose to stay. Both are legitimate choices.
"Necessity is the mother of invention" is a silly proverb. "Necessity is the mother of futile dodges" is much nearer the truth. -- Alfred North Whitehead