A user may want to create new notes with the Obsidian URI for whatever reason as described here: Obsidian URI - Obsidian Help. They can only specify the name or the path.
Proposed solution
There should be a parameter for folder name so the user can enter in both the name and folder, and the note will be created in that folder, no matter what the path of that folder is.
Perhaps one of two things could be done: Obsidian picks whichever folder, or you pick the folder and Obsidian can remember it even if you change the location of it.