No one would think that Zhou Tian came over for such a challenge out of boredom.
Thus, from the perspective of most Deities at the time, Zhou Tian challenging the True God must have had his reasons. Generally speaking, those True Gods naturally assumed that Zhou Tian's main purpose in challenging was to lure him out of the Divine City.
Although Zhou Tian's strength was powerful, wanting to take down the True God while he was fortifying himself in the Divine City was no easy task. So, under those circumstances, if Zhou Tian wanted to deal with the True God, the best method was to trick him out of the Divine City.
And as long as that True God no longer had the protection of the Divine City, with Zhou Tian's strength, dealing with him would theoretically be a trivial task.
