Frost is using a very unemotional and detached tone of voice in describing the tragic event recorded in "Out, Out." There is no personal involvement or connection between the voice telling the story and the persons actually involved in the action.
"Call it a day, I wish they might have said" indicates the narrator's awareness of how the events played out, but there is no indication of the narrator's approval or condemnation of the way in which the boy's responsibilities and capabilities were assessed and used or abused. The narrator expresses the wish that the boy had been spared the accident and the early death that resulted.
Once the accident happens, however, the narration is very matter-of-fact and straightforward. The boy pleads with his sister - "Don't let him cut my hand off" - but the injury is too severe. The boy dies. Life goes on - "they, since they were not the one dead, turned to their affairs."
And then—the watcher at his pulse took fright.No one believed. They listened at his heart.Little—less—nothing!—and that ended it.No more to build on there. And they, since theyWere not the one dead, turned to their affairs.
frost uses a very unemotional use language. He seems to be angry by the end of ther poem. We can see this from the last line when he talks about how none cared about them itself. Also he id an observer in the poem and not part of the problem in any way