OK well I'm done posting, but just so you know, my quote came from the plugin that you pointed to as the solution to the problem:
https://wordpress.org/plugins/simply-static/
from that site, it states "Simply Static creates a static copy of your website, which is just a collection of files: HTML, CSS, JS, images, etc. Any functionality that requires PHP code will not work with that static copy. That includes, but is not limited to: blog post comments, contact forms, forums, membership areas, and eCommerce" down in the faq section. That is from the plugin that you suggested, not me !!!
Simply Static is not a WP caching system, it is a script that makes a static copy of your website. And it won't just make 1 page, if you add anything to your website, it has to go thru and re-make the entire site, if you have 10K posts, it will re-make all 10K posts.
Now a caching system like I use, WP Super Cache, will do just what you said, but it doesn't protect you in any way, from plugins, or core code that is bad in WP. Only constant vigilance, and checking to make sure there aren't any new WP or plugin updates can do that. And I have better things to do, than to worry about which site will be hacked today
So have fun with your WP installs
