What reasons does Hector give to explain why he has to go out of the city when Troy is well-fortified and safe within?

Hector explains that he must go out of the city to confront the Greek forces because it is his duty as a warrior and leader to defend Troy and its people. He believes that staying within the fortified walls would be seen as cowardice and would undermine his honor and the morale of his troops. Additionally, he feels a sense of responsibility to protect his family and homeland, which drives him to take action even in the face of danger.