I use markdown because it's easy to read without rendering. All of the alternatives in the article seem worse

If I wanted more structure, I'd just write html; or mix html into the markdown.

Pandoc lets me do things like generate libreoffice or microsoft word documents from the markdown, using a reference document for styling of headings etc. This also gives me good enough control to generate OK looking pdfs. It's not LaTeX levels of control, but it's much easier

I don't want to do extra work to hypothetically make things easier for an LLM.