No point in getting emotional about anything. Being emotional didn’t help with survival. What mattered was to learn everything, analyze the situation, choose a course of action, and then move boldly. Know, think, choose, do. There was no place in that list for “feel”.
Not that Bean didn’t have feelings. He simply refused to think about them or dwell on them or let them influence his decisions, when anything important was at stake. (Ender’s Shadow)