How does the narrator's use of the simile in this line from Paragraph 3 affect the passage?

It’s like they’re inching along a malfunctioning assembly line that’s churning out mismatched pairs of feet;...

It paints a funny picture of the narrator’s visual perspective.
It shows that the narrator's complaint about the diving board applies to other areas of life.
It makes a social commentary about the misery of factory work.
It lets the reader know that the narrator doesn’t like today's styles.