At that time, Zhou Tian no longer dared to casually deplete his energy.
Now is different from before; if it were in the past, Zhou Tian would definitely have chosen to fight back when encountering such a situation. After all, engaging in a war of attrition wasn't a first for him, even though he knew dealing with those zombies wasn't wise. Despite knowing he might regret his actions in the future, at least at that time, he would have continued to attack those zombies.
But the present is different from the past. Even though Zhou Tian's nature very much wanted to turn around and fight those zombies to the death, his rationality perpetually stopped him from doing so.
Even though the actions of the Deity at that moment had infuriated Zhou Tian, as much as he wanted to take revenge against the other party, he still had to consider the influence of the environment he was in at the time.