Be very well prepared for an answer as to why you want to be a writer. I have seen people even reply; it is easy to be a writer. Such solutions mean you have lost the job.
One of the answers that I may expect is:
The scope for growth as a writer is one of the key reasons for me to be a content writer. Moreover, there is a lot one can do as a writer in writing styles, formats, tones, etc.
Ultimately I want to deliver a great content strategy for the company I am working for.