There are plenty of advantages to using Craft as a CMS for website owners:
Easy content management: Craft as a CMS makes it incredibly easy to manage content, from blogs to duplicating pages, with intuitive control panels
Flexibility: it’s an open canvas, so if you want to work with Craft web developers in the future again to add new functionality to your site, it will be possible.
Community support: there is plenty of community support available for Craft website owners to help you with the day to day running of your website
Security: Craft is very secure as a CMS, utilising OpenSSL to protect accounts