Noah’s plan
Noah retreated from the battlefield so easily because of these exact reasons, relying on the lord's protection for his safety and ensuring the village's security.
The reason why those other old monsters at the tier three wizard realm were stunned was because of Noah's calm retreat; they had the greatest chance of surviving this beast tide if they worked together.
Even if one ran away and hid in the village, the beast tide would eventually sweep over them, the longer the beast tide lasted the stronger it would become. This was counterintuitive and stupid at the same time.
That's why the other village leaders could have never imagined that Noah would retreat. In their eyes, it was a foolish decision.
However, for Noah, it was the best decision. Not only would he be able to entirely occupy the wilderness after eliminating all the opponents of the five villages with the beast tide, but he would also be able to get rid of those pesky landlords.