If they didn't take any action, those small forces were well aware that with the performance of those top forces at the time, they wouldn't have a way to survive.
On the contrary, if they chose to support Zhou Tian at that moment, although it might not ensure their survival, having Zhou Tian as a backing could increase the chance of vitality. Even if they ultimately faced inevitable death, causing greater losses to their enemies before dying was still a preferable choice for some forces.
Moreover, although from various perspectives, almost none of those small forces believed that Zhou Tian would ultimately win. However, regardless, the ability to push those top forces to such a position indicated Zhou Tian's strength wasn't weak. From the circumstances at the time, if Zhou Tian performed exceptionally well, achieving victory in the war wouldn't be an impossible feat.
