Saying something is “dumb” is too nebulous to derive any meaning. Could you elaborate more? If you have the technical chops/insight to provide critique or even alternative recommendations then that could really help to etify the community. These kinds of convos are great for understanding privacy better.
Maybe you have JavaScript disabled?
uBlock is not reporting anything weird and the network tab resources for the browser’s dev tools show nothing suspicious. Combing over the JavaScript sources with the dev tools also show no privacy concerns on fingerprinting.
The posted link is using a FOSS project called markmap (https://github.com/markmap/markmap?tab=readme-ov-file) and the project looks solid from what skimming I did.