This sounds a whole lot like the indigenous peoples of various lands until the imperial machines of war rolled them over. These days, I don’t think you need a military budget rivaling America’s, but I think some form of military defensive structures would need to remain in place to protect your massive hippie nation-state from opportunistic neighbors.
“These beings have documented a perfect understanding of warp core, matter transmission, and matter replication technologies, yet they refuse to actually use any them and are stuck on a single planet fighting wars over limited resources.”