The position of leader carries many privileges, many of which Zhou Tian is already aware of. For instance, he can command his subordinates to come to his rescue when in danger. As long as his subordinates have enough merit, Zhou Tian can appoint them as Beastman Warriors or Beastman Champions.
At the same time, apart from the powers that Zhou Tian already knows, the Beastman leader has many special privileges that Zhou Tian doesn't know.
He would not have thought before becoming a leader that all monsters are, in fact, independent branches. Although they're currently under the control of the Blood Moon Lord, if Zhou Tian intended, he could split off and establish his power at any time.
Of course, Zhou Tian indeed holds such thoughts, but he is also aware that he doesn't possess the strength to act that way at this moment. Therefore, although the idea occurred to him once he knew the circumstances, he kept it suppressed deep in his heart after serious consideration.