That doesn’t track at all. Markdown was created as a simpler way to mark up text than HTML. They are both ways of encoding a document that provide ways to convey intention. HTML is no one’s end goal.
> Markdown’s syntax is intended for one purpose: to be used as a format for writing for the web. […] For any markup that is not covered by Markdown’s syntax, you simply use HTML itself.
Understood. What I was trying to say but elided pretty well is I think it's now become something else. Almost its own in-between format that provides a fair bit of marking for clarity with a level of security and the ability to extend as needed. Definitely my own perspective as it's my default for working in Slack and Teams, I keep notes in Obsidian, etc. At no point do I think of those as places I am trying to write HTML, just places I am trying to write with the ability to add more context.
> Markdown is a text-to-HTML conversion tool for web writers.
HTML embedding was also integral to it: https://daringfireball.net/projects/markdown/syntax#html
> Markdown’s syntax is intended for one purpose: to be used as a format for writing for the web. […] For any markup that is not covered by Markdown’s syntax, you simply use HTML itself.