Netlify requires adding a few static assets to your site that handle authentication and CRUD actions. This then updates your git repo. The format of the posts are in Markdown, so it may not be the most user-friendly, but the end user would not have to learn git.

https://www.netlifycms.org/docs/add-to-your-site/

https://www.netlifycms.org/docs/add-to-your-site/