As long as he's trapped within the opponent's enclosure, Zhou Tian knows that he will inevitably pay a heavy cost at that time. Based on the strength those plants have shown, it wouldn't be impossible for Zhou Tian to be surrounded and killed by them.
Knowing the consequences of a forced breakthrough failure, Zhou Tian was aware he had to break through the opponent's defense line according to his plan. Yet, when truly facing that situation, Zhou Tian simply didn't know how to proceed.
Stuck in a dilemma, if he didn't make a breakthrough, then Zhou Tian's previous plan would ironically become a joke. Lacking the courage to break through, even though the exit was right ahead of him, Zhou Tian couldn't leave the treant's body through those positions.
Thus, if he couldn't leave, then when the True God's backup plan activated, Zhou Tian felt he wouldn't necessarily survive to the end.
