That's a good argument. However, Quarkdown is still a strict upgrade over typing latex directly or whatever, and you get more predictable results and better compatibility with LLM-assisted editing than with a GUI editor like Word.
I write LaTeX by hand all the time whenever I need to put any math in my notes, and depending on your use-case or field, you learn the LaTeX for that which you use often and it's faster than trying to use most tools.