Why the first officer demands that the captain of the ship see the doctor in James and the giant peach?

In "James and the Giant Peach," the first officer insists that the captain see the doctor because he is concerned about the captain's health and well-being. The captain's condition affects the crew's morale and the ship's operation, making it crucial for him to get medical attention. This demand highlights the importance of leadership and the welfare of those on board. Ultimately, it underscores the theme of responsibility in the face of adversity.