It's not just Edward and his group; other perceptive players are also leaving this battlefield. These people's actions are truly foolish.
With someone holding off the Faceless One, they have a chance to fish in troubled waters. Now, they've inverted priorities, besieging Li Yao. It seems like they're after military merit and the first kill, to eliminate the greatest opponent, but in reality, they're courting death.
If no one restrains the Faceless One, few among them can truly damage it, while the rest can't even inflict harm. Attempting to kill off their opponents prematurely is simply foolish.
Those who retreated, do they not know Li Yao is the greatest threat? Of course, they do. Don't they want to kill Li Yao? Of course, they do.
But is this the right moment? At least disable the Faceless One first, then attack Li Yao when the real opportunity arises after he's detached from his team.