Exactly, you just confirmed how complicated, complex and varied markdown rendering is, which is exactly why it should be left to markdown applications.
The OS should be able to natively open plaintext. The joy of markdown is it still largely works in plaintext.
> The joy of markdown is it still largely works in plaintext.
Except it doesn't because it isn't, the challenges above are from editing raw. There is no joy in reading/editing anything non-primitive in MD