The greatest source of danger was the cultivators who were "stealthily crossing" with him.
Before passing through the passage, none of the cultivators wanted to spend too much time engaging in combat, since, after all, their goal was the same: to cross the passage. They didn't want to cause any complications that might delay their progress. That was why the Outer Path cultivator from earlier had merely unleashed a flash of Tao Light and halted upon realizing Han Yi was difficult to deal with.
But after passing through the passage, the situation was different. They had accomplished their primary goal, and it was very possible that some of them wouldn't mind turning into Robbing Cultivators and looting others.
It was well known that most of these stealthy travelers were up to no good, otherwise they wouldn't have paid the higher price to use the unstable temporary passage.
