Why isn't that evidence of 5-C early game Terrarian? The argument for scaling was that the Wall of Flesh used a special energy system why doesn't that apply to the Blood Zombies who became stronger with the Blood Moon's curse twisting them and giving them magic blood that can alter the rotation of the moon.
Besides that there are the
World Feeders hardmode enemies who are directly compared Eater of Worlds being just as deadly and
Guide's uses fighting normal hardcore enemies for his ap justification.