No it is wrong fundamentally, if you were not invested in Nostr and someone asked you to build a backend to a note taking app, you might choose something like LMDB locally or WebDAV remotely etc.. you won't choose individual JSONs with set reconciliation. I assume of course. Events with set reconciliation has always been the tradeoff you make when you want to avoid a source of truth or a lock on write, but it is not clear you need that for your use case. Maybe you do need it what do I know.