Look it's very simple. When someone has the ball, the other players cannot have it.
If you have lots of players who like the ball, you need players who run to receive it.
This guy will ALWAYS be useful because he doesn't want the ball. He wants you to have it.
When you have a cm who ends up ahead of your #9 in attack and doesn't sacrifice defensively, then he will always be useful. Because if that was so easy then EVERY CM would do it. But it's not