According to the situation at the time, Zhou Tian's chance to kill the Human Emperor would naturally become significantly greater.
If it had been before, it would have been extremely difficult for Zhou Tian to kill the Human Emperor. Without overall strength that matched those living beings, even if Zhou Tian was eager to kill the Human Emperor, he wouldn't have had such an opportunity without defeating those living beings first.
But now, the situation was different. Since those living beings had released the Human Emperor, it was clear that they had the idea, intentional or not, of letting the Human Emperor fight Zhou Tian. Given the mindset of those living beings at the time, it's doubtful they would protect the Human Emperor, let alone offer timely support in the event of his combat with Zhou Tian.
