The occasional spray of shots and the sound of firing have become commonplace; people are now accustomed to them, O Sire!

This couplet highlights how repeated exposure to small adversities, metaphorically described as 'sprinkles of gunfire,' eventually makes people accustomed to them. It suggests that what once might have been shocking or disturbing has now become commonplace. People have grown used to these challenges, developing a tolerance or even indifference towards them. The phrase 'they've become habitual, Father' implies a sense of resigned acceptance or desensitization to ongoing hardships, where the extraordinary becomes ordinary and no longer evokes a strong reaction.