Noah was a prisoner, and his companions weren't any better. However, the poor control over the battles gave them the chance to seize a few benefits.
June and the others didn't actively join the assault. They had no reason to fight rank 7 cultivators when they had a swarm of rank 8 bees battling on the frontlines.
The same went for Luke and his two companions. They could exploit the chaos of the battlefield to seize the many resources hidden inside the city.
Jordan and Divine Demon had done the same after Noah killed the second rank 8 expert. The battle had lasted a little more than a few minutes, but Noah's team had greatly benefitted from that victory.
Noah was happy as long as he continued to gather resources. Cultivators provided far more nutrients than magical beasts due to their dantian, so they were perfect targets.