Do we need a Professional Scrum Master Forever?

Does the role of the Scrum Master go away with time? For addressing the doubt, first, understand the role of a Scrum Master clearly.
Suppose you go by the Scrum Guide, the person accountable for ensuring that everyone in the Organisation understands the purpose of the Scrum Framework. Thus, the Scrum Master serves not only the team but also the Product Owner and the Organisation.