[LOTR] what makes humans unique or special?
Every single race outside of humans seem to posses some manner of extraordinary quality. Orcs have tremendous physical strength, Dwarves are incredibly intelligent designers and engineers, Elves are tremendously long lived and adept with magic, Fae have a unique bond with nature etc etc.
Humans seem not to have any particular advantage in any area. Some humans might be pretty OK with magic others might be fairly adept with engineering. Others still are fairly impressive warriors. But none of these can reach the levels of sheer impressive feet of any of the other groups. Also usually be impressive, sorcerers, or engineers, or warriors are usually only a handful in any particular generation of humans.
How are humans even able to survive when coexisting alongside such powerful races?