I got it. I’m having some difficulty in comprehending your post, however, perhaps because I’m English and rely on plain English… though I confess I did mis-spell ‘Marknote’ as ‘Marknotes’ - I do indeed have the note management application installed; and it is NOT what is meant by the words ‘Markdown Editor’ as your initial post asserts.
Marknote is a ‘Notes’ application which watches folders with notes in them - it does pretty much the same job as the proprietary Obsidian.
Something also to be noted - Obsidian does pretty much the same job, but also has a link to ‘edit in default app’ which could open your markdown file in a dedicated Markdown Editor.
Marktext is a markdown editor - a simple writing application which does not handle notes or heirarchies or anything else (and, as such, could be replaced with just about any other editor depending on what kind of interface you like - Kate could manage it, though without the slick interface).
Where is the confusion here? There is no argument… yet you seem to be arguing about it.