The underlying purpose of the story of Goliath is to show that Saul is not fit to be king (and that David is). Saul was chosen to lead the Israelites against their enemies, but when faced with Goliath he refuses to do so; Saul is a very tall man, but Goliath is a giant.
All the other ones would result in an incomplete understanding of the text. Slowing her pace at parts that she struggles with will help Sabrina understand the text more thoroughly.
