Backend access should only be given to the appropriate users. In addition to limiting access on the business side, you should remind clients to refrain from granting backend access to unknown users. A website design company will often limit access to web developers and necessary team managers, this includes access to integrated commerce technology platforms. - Source: dev.to / almost 3 years ago

If you really want to stop using Markdown to write with, then the best solution will be to use a proper conversion tool to turn these into word processing documents, such as DOCX or ODT, and then import that into Scrivener. I don't think (without plugins anyway) that Obsidian has any way of making this easier, but a good general purpose tool for this is Pandoc. Source: over 2 years ago