A Salesforce admin doesn’t require coding as part of his or her daily job because he/she will be working within a team. That team will consist of developers and consultants who will take care of the coding part. The admin has to take care of many decisions. If he or she know coding, it’s a value-added skillset. Coding is always an advantage but not necessary to start a career as a Salesforce admin.
Salesforce administrators can do a lot of salesforce developer jobs without coding. However, this limits job scope. If you want more freedom in the role, and career advancement, you should also become a salesforce developer.