Yep, in that sense it's really not fair at all to compare it against traditional services that lock you in like Evernote/Notion/Roam.
I guess I can sympathise in the sense that I really wish org-mode was more widespread outside of Emacs. It feels like a real barrier for adoption (if you're trying to get into semantic org-mode features, not just merely using it for syntax). But I don't see what we can do about it for now.
I think rather than trying to get org mode outside of emacs, you want to change the mechanics of entering emacs. In my head this looks like a subset of emacs (in the same way you can imagine notepad a subset of word, or contenteditable a subset of codemirror). If there were an emacs-lite application that just surfaced simple org mode functionality and bindings like moving the cursor or paging removed behind a settings wall, I think adoption of emacs would rise due to the lower barrier of entry.
But I think there is something there. I use org-mode, but even though it is "just" text files, there is no specification to implement against, all the cool stuff Emacs can do with org-mode files.
I guess I can sympathise in the sense that I really wish org-mode was more widespread outside of Emacs. It feels like a real barrier for adoption (if you're trying to get into semantic org-mode features, not just merely using it for syntax). But I don't see what we can do about it for now.