Perhaps the two directions are a reflection of the divergent ways that writers now work. Back in the early days of personal computers, all writing was still directed at the printed page. But, with the web and, now e-books, writers must create content that looks proper on *both* paper and computer screen.
Problem is, few writing tools are good at both.
Word processors (and even LaTeX) are still designed primarily for creating documents for paper. When they are used to create HTML content, they load the file with all sorts of complex (and probably unnecessary) code.
MarkDown editors do a decent job of creating clean, simple HTML code for onscreen viewing, but their print output can be iffy, and there are so many MarkDown flavors that a document created by one editor doesn't parse well in another.
What is needed is a simple system where a writer can write and edit his content once, then press something like "F1" for print (PDF) output and "F2" for screen (HTML) output and get excellent and intended results with both. So, far, my own obsessive search has failed to find it.
Virgil