I think it can be useful if you want to use an existing Google Sheet, or if your users want to modify the database directly in Google Sheets, even though it seems pretty risky.
I'm building a similar project, and I may open-source it. I'm using OnlyOffice and a coding agent that modifies the files with Python libraries in a sandbox (e.g. python-pptx for PowerPoint files).
Have you also considered using a solution like OnlyOffice for your product? Or a "Notion-like" lib such as Tiptap or PlateJS?
I wanted to build something canvas-based, so that eliminated most of these options. I also just wanted full control of that part of my stack... it's the core product after all. There are several TipTap/ProseMirror wrappers out there already.
You should share yours though, would be interested to see