<span>He fails to deliver an important letter to Romeo.</span>
Answer:
Giving a counterargument allows the essay/writing to contain more perspectives that strengthen the claims as more perspectives allow the reader/viewer to see an overall "picture" of the argument. Also, being able to "debunk" the counterargument as false or not strong will help in strengthening your own essay/argument.
Including only your side of the argument leaves the reader/viewer no perspective of the whole topic.
Because hazel is already handicapped by nature. she was born the way she is and George was born without anything wrong.
If you don't you will look un-professional which is not what you want.