Do we worth existing?

In a story,
you should be happy that your name was there,
because you are needed.
Dont get sad or what just because
your name seem so small or
it appear for only one time.
Some people's name existed only because
someone is gone and they need you to replace that someone.
They are the one who should be sad.
Why?
Because their existence seem to be so useless,
not important.
They are the same as not existing in the world.
Sometimes,dont treat them as granted.
Cus..
When you need their help again,
they may not be there,they may be gone.
No one wish to be a sub from the beginning..