I'm not saying it's bad to design a website in plain HTML, but it is critically limiting, and I wouldn't recommend it over a simple generator setup. If you're really opposed to using a fully-featured SSG, it'd be pretty simple to write a shell script that uses mustache(5) [1] to plug html articles into a template. That's almost as simple and clean as plain html, but it's a real step up when it comes to what it lets you do.
https://medium.com/change-your-mind/the-simple-40-minute-mor...
What we have is, essentially, a blog post that could be written in pure HTML, and a link to the user's profile, which looks like this: https://ashley-richmond.medium.com/ This is one of the most popular blogging platforms and follows exactly the hub-and-spoke navigation model that I described.
Now, I do what to clarify, what I proposed is how I would build a website using plain HTML. I would certainly not go so far as to claim that it is the best way to build any website, SSG's have many advantages, but what I'm saying is that if one is going to write a plain HTML website, the easiest way is to accept the fundamental limitations of that approach, including a hub-and-spoke navigation vs a navbar. If you're writing a plain HTML site, you're probably a bit iconoclastic and willing to accept breaking some standard practices.