What does 1 Samuel 17:28 mean?

When David’s oldest brother Eliab heard him talking to the men, he got angry and said, 'Why did you come down here? Who’s watching those few sheep you’re supposed to be taking care of? I know you’re just arrogant and nosy. You just came to watch the battle.' 1 Samuel 17:28 - Modern Text Bible

(Eliab is annoyed and accuses David of being irresponsible and just wanting to see the action, not understanding David’s real motives.)