I've seen this before. Someone starts a hobby project, and then creates this elaborate public website to try to make their hobby project look really serious and professional and important – maybe as a form of public daydreaming, maybe because marketing is more fun than actually writing code, maybe because they hope collaborators will flock to their project as result of said marketing.
Personally, I much prefer those hobby projects which focus on code instead of publicity.
That was my first thought but, checking repo, dev has done solo work for 4 years now, and, based on IA, site is has only been recently made. So the focus for the most part has been in code.
I don't get that vibe at all from this site. It's an extremely concise web-1.0 style hub of simple text and links covering exactly the set of information you would hope to get out of a project like this. Nothing there seems unearned or unwarranted given the scale and history of the project.
Personally I wish more professional projects followed this school of design instead of publishing cookie-cutter landing pages slathered with hero images and feature cards.
Personally, I much prefer those hobby projects which focus on code instead of publicity.