Zhou Tian's purpose in delaying time was simply to enhance his own strength, and once he became stronger, his goal was to deal with that powerful adversary. As such, based on the situation at the time, fundamentally speaking, all of Zhou Tian's actions were serving the purpose of defeating that adversary.
Thus, when Zhou Tian felt that his strength was not enough to completely overpower the adversary yet, but that he already possessed the ability to fight them, he was no longer satisfied with flight as a method of combat.
After all, what Zhou Tian needed was just a certain amount of development time. If fleeing could delay time at this moment, fighting the adversary with his newfound ability could also be considered a way of buying time.
