Dark Forest theory is not predicated on things someone else wants from us, rather on competition. One must eliminate competition without revealing one’s existence. Any competition for finite resources is an existential threat.
See here for a better explanation than I might give:
Dark Forest theory: A terrifying explanation of why we haven’t heard from aliens yet
The Fermi paradox asks us where all the aliens are if the cosmos should be filled with them. The Dark Forest theory says we should pray we never find them.
We won’t be serious competition to a civilization that could do that for centuries, if even then.