Though Scrum is built as an exceptional platform to make the execution cycles of a project more efficient and value added for everyone involved, lack of support from a CSM can really limit the scope of the platform. Having a CSM to supervise your projects and their execution can bring a new sense of scope for the entire platform as they know to do things more strategically and effectively.
Typically a CSM is incredibly trained professionally to take advantage of the platform in all the possible scopes the platform has been devised in the first place. With the right understanding of its functional capabilities and applications, a CSM can help the team learn the platform well and take advantage of the same for effective and high quality project execution metrics. A Certified Scrum Master can always explore the possibilities of the platform in supporting your projects to be executed in the most excellent and effective way.
Also, being a CSM is truly a feather to your employability. It makes you an exceptionally valuable commodity in the job market and provides you privilege to interact with several platform experts and developer communities for future development initiatives. Thus you can surely grow to wider professional dimensions.