Why a Static Website?
I have worked two decades with CMS like Wordpress and Drupal. Simple and good CMS. But they are Slow. Drupal 8 was when I tested it painfully slow, so I kept using the old Drupal 7. But have now replaced it with Go based websites.
There are few advantages with CMS. One is that "everybody" can change and manage the content. The other is that almost "everyone" can create a website using CMS.
Yes, The time to change the content of a static site takes 2 minutes longer than changing the content of a CMS. And yes, there is a higher threshold, as you have to learn to code from scratch. But! You have full control of every pixel. Not hidden by a "magic framework". The reward is full control and a super fast site.
Note that this is my opinion and not facts. YMMV.