Réponse :
Imagine if Juliet didn't plan the temporary death potion. And imagine if she didn't made an appearance of her death. Romeo wouldn't have known that she was faking it. Romeo wouldn't went to her grave. He wouldn't have to see her dead. He wouldn't to be sad. And imagine if Romeo had received the letter from Friar Lawrence saying that Juliet wasn't dead. Romeo wouldn't have thought of suiciding beside of Juliet. The story would have had less sad and less tragic ending.