To me, it looks like creating a font isn't terribly difficult based on https://kokorobot.ca/site/making_a_font.html.

That said, I'm a no-talent hack and I'm sure any font I created would look like I ate and subsequently vomited off-brand crayons onto the screen.

there are degrees to it, a personal handwriting font is easier because you can manually adjust it as needed... you don't really need to worry about the endless number of edge cases produced by other languages and user-input text

Someone wanted to make work for themself.

Or justify themself being present at their "job". :)