Mark has the high ground
And the resources to hold it
Walls and a moat on one side, the ocean on another. And an army.
The most defensible position in the town
Steve wonders if he was always going to be such a distraction. But hearing the list read out loud drives home an important point. Here he was using his resources to take out an army that was of no immediate threat to him to help people that were of no immediate use. He continues collecting the weapons and magazines as his mind processes this thought:
Steve: How useful are they to me? Utility is for machines though. Weapons, Belle, the Beast and so on, not people.