In the play, Friar Laurence's advice to the couple is to wait and be patient, letting the feud between their families cool down before revealing the marriage to the world. He suggests that they secretly enjoy their love while working behind the scenes to reconcile the Montagues and Capulets. This course of action requires patience and restraint, which seems difficult for the impetuous and passionate young lovers.
Romeo and Juliet's decision to disregard Friar's advice has tragic consequences. Their hasty actions lead to a series of events beyond their control, culminating in their tragic deaths. It's important to consider that the play is set in a context of societal conventions, honour and family loyalties. Their disregard for these obligations underscores the play's exploration of individual desire versus social expectations.
Critics argue that the lovers' failure to confide in Friar Laurence about the plan to fake Juliet's death contributes to the tragic outcome. Had they followed his counsel more closely, they might've avoided misunderstandings and despair that lead to their untimely ends.
Ultimately, whether Romeo and Juliet should've followed Friar Laurence's advice remains a matter of interpretation and debate. Their choices and actions are integral to the play's themes and the exploration of human nature, fate and the consequences of passionate love in the face of adversity.