The main reasons to use a CMS have nothing to do with user interactivity. It’s about content sharing and reuse between pages. Interlinking of Pages. Site wide configurability.

Yes some small companies and personal web pages could be replaced by static HTML with minimal inconvenience.

But most companies benefit greatly from a CMS.

How about instead of telling users not to use a CMS, the CMS developers start listening to the security concerns that have been brought up to them again and again for the last 20 years.