K1-Phantoms didn't usually visit the regions intended for K0-Phantoms, and the same was true for K2, K3, and K4-Phantoms.
It just didn't make sense for them, except for a special mission where they were helping one squad. Adam participated once, and because of the dark Phantoms, it ended in tragedy.
Thus, Tron, who had recently become a K3-Phantom, would never visit Silat Village, Rusty Ruins, or any other location below his level. The monsters there were too weak, with few genes, simple artifacts, and no development.
Thus, it was unnatural for Alienated Rocks to have a K1-Phantom like Adam, but sometimes it could happen, but there definitely shouldn't be a commoner here!
The only commoners that were supposed to visit Dead Lands were Harvesters and Military, but only with Phantoms and squads, and only for the duration of missions.