I should add that, if you do want to use Obsidian as the repository for your ideas, etc., one way to quickly get everything into Obsidian is to use Scrivener’s sync folder feature. The idea is to use the sync folder to import all your ideas, aphorisms, etc., into Obsidian without manually moving everything over, and then use Scrivener for your writing.
There are plenty of discussions in the forum about using the sync folder. One that I started is here: Scrivener, Obsidian, and Aeon Timeline…Oh My!, though in this thread I’m discussing a different need and workflow. In your case, I don’t think you’ll need to sync Obsidian back to Scrivener once you’ve moved everything over; just move it over once via the sync folder, copy everything in the sync folder into a new Obsidian directory, turn off syncing, and you’re good to go.
That said, Scrivener is quite capable as a repository of your notes, etc. See Using Scrivener for project notebooks written by @AmberV. I’m just offering another way to work with Scrivener, so maybe this is helpful.
P.S. Another way to move the files over to Obsidian is to use Scrivener’s compile function. I personally don’t spend time with the compile feature, which is why I didn’t think to suggest it at first. It’s quite possibly the better and more direct method compared to syncing.