It requires a bit of a learning curve to compile from Scrivener. I’m with you, I would not use it for something like sermons or presentations. I’m only using Scrivener for a book length project. I might use if for a long essay, article–20 pages or more. I also like Ulysses but I’m adverse to subscriptions. 
That said, I’ve gone "back to the future."
I’m using Pages for most of my writing so I can have the advantages of rich text without the clutter and encumbrances of markdown. My one exception is I use Obsidian for my research files. And, as I wrote here, it is easy to create a “focus mode” in word processors.
The reason I feel comfortable using Pages (or Word) for writing is that I can export to plain text if needed and/or I can convert any file using DEVONthink so I’m not concerned about future proofing as much as I thought I needed to be. I think the enthusiasm (which I’m NOT criticizing) for markdown in this forum and certain podcasts caused me to be unnecessarily concerned about lock-in. In fact, I wrote on this very forum that I was never writing in anything but markdown. One should never say never! 
Here are the export options in Pages:
In Word:
Conversion Options in DEVONthink:
Compile Options in Scrivener
- I am supplied with MS Office, which I use daily, by my University. I’d probably pay for it if I didn’t.
I think MS Office is a tremendous value but I just don’t like using their apps. I do so only under compulsion–my editors.