If you are creating more complex documents, the advantages become more pronounced. Styling in Pandoc means modifying templates, at which point you’re just writing LaTeX, and styling in Typst is much nicer than in LaTeX. You can also hit the limits of Pandoc templates quite easily, at which point you have to write Lua filters. I have found those to be quite cumbersome, and now your document logic is spread out over the Markdown source file, the LaTeX template, and the Lua filters. In Typst you can have a single file with your whole document in a clean modern format, and you can decide for yourself how much you want to separate content and presentation.
I would also say that this library covers more or less the “lower half” of solo ball juggling in terms of difficulty. With lower ball counts (say ≤ 4), there are a lot of these patterns that have complex arm movements and can be difficult to explain with words, so having such a listing with animations and step-by-step instructions is very valuable. Starting with 4 balls, there’s less and less time for moving your arms around and it is more about the sequence of heights of the throws, which are well described with just their numeric “siteswap” pattern and you can learn them just from knowing the number sequence. The site has only the most basic of those (e.g. 534) and even very common 4-ball (7531, 633) patterns are missing with hardly anything beyond that.
[1]: https://ianconvy.github.io/projects/other/libraryofjuggling/...