Markdown is still a structure. It may be a very loose one, but it still enables a reader (of any flavour) to, for example, determine which parts of the text are code and which aren't.
> determine which parts of the text are code and which aren't
With this argument you'd could claim ASCII/plaintext is "structured data" too, just group code with "===" and that's evident. Obviously that doesn't make a format "structured data".
Well, it was semantic from the beginning, the whole discussion I raised is because you seem unable to understand what "structured data" actually means in reality. I know perfectly fine what you meant, and you were misinformed about the meaning, it's OK to just say "Yeah, you're right" or just don't reply at all instead of double-down on not understand the meaning of words. Anyways, enjoy your day.
Oh no, my mood is great, life couldn't be better. Don't mistake me wanting people to use words they understand for me being upset, it's just words and text, ultimately it all has little meaning compared to the grandness of life.