Most WP sites should be static sites.
There are a number of different ways to do it which range from Next.js with WP as a headless CRM (my current preference), or using a static site generator plugin inside of WP. I can recommend "Simply Static" as a handy plugin that (combined with nginx) will make as much of your site as possible static but still updates quickly and can allow some dynamism.
But it does introduce complexity, and the more frequently the site changes the less it makes sense. As the site grows also most sites end up wanting dynamic stuff that often can't (or shouldn't) be done on the client-side, slowly making the static build less and less useful. It's just not that simple.
On WordPress, you can change a tag, hit save, and the change is live.
On a static site, the change would look more like: edit a file, rebuild the site, deploy to production.
I left WordPress for static sites 8 years ago and never looked back. It's so nice to eliminate the database and web server from your stack and have everything under source control.