Nids are a lovecratian horror tho. Lovecrafts horrors were the unknown and human actions flatout not mattering, any heroism against the hive mind is akin to one particulary troublesome shrimp - about to be eaten by a whale. The Shrimp can bite and stab all it want. It doesn’t matter. And the whale won’t notice.

It gets even more obvious when you remember Genestealer Cults, basically Lovecrafts cults summoning their gods.