Zhou Tian was confident, and given the mindset of the True God he faced, even if he didn't gain much advantage in the opponent's hands, he wouldn't suffer loss either.
To be frank, Zhou Tian came to trouble that True God for revenge, but replenishing cultivation resources was the core purpose of his action this time.
Ultimately, no matter how generous Zhou Tian appeared for survival at the time, it still couldn't significantly impact reality. Even if Zhou Tian himself didn't care about the loss of those resources, given the consumption of his current power, Zhou Tian must ensure enough resources are at hand.
Otherwise, if he can't even fulfill the cultivation needs of his subordinate deities, one can imagine that even if Zhou Tian controls the life and death of his deities, those subordinates may surely become disloyal. And surely, given the situation at the time, regardless of how well Zhou Tian manages, the loss would indeed be significant.