I can't fault you for that. For me, Obsidian feels like it's in an uncanny valley: it looks like both FOSS (free to download, use, whatever) and proprietary (you don't have the code), and I'm waiting for the other shoe to drop ("now that we're out of beta, that'll be $300 per year"). That'll probably never happen, and they've been a pretty good group so far, but it could.

I'm going for a different approach. All my docs are stored as Markdown in iCloud, and I use iA Writer to edit them. It's a proprietary app, but one with an exception track record of "buy once, use forever". It's a native app, too, unlike a lot of the alternatives. And if iA Writer ever explodes, all my files are right there in glorious plaintext. I could do, and have done, the same with Obsidian, but I just like using Writer more.

The only database-backed app I've ever completely trusted is Drafts. Yes, my data is stored in its proprietary system. However, it exports the data regularly to a JSON backup file that's trivially easy to parse. It's also never, not once, ever, lost a single byte I've put in it. That little app's bulletproof.