A Mere Image of Henry

Why would the boy leave Bardolph, Nym and Pistol?  It appeared as if they took care of him and treated him fairly.  The boy left them because when they joined Henry's army he saw what kind of cowardly scoundrels they really were.  The boy was smart when he said, "I must leave them and seek some better service.  Their villainy goes against my week stomach, and therefore I must cast it up."   His statement shows a desire to live a respectable life unlike his former company.  Henry is much like the boy because he too left the scoundrels of his youth to make a better life for himself.  Ironically, the boy and Henry happened to leave the same drunkards.