During Covid lockdowns I put together a genealogical research solution. At first I had no plans to share it. However, with a great TW community helping me I did share it. In doing so I put together an online help for it—also written in TiddlyWiki (which needs more content and proof reading). https://clsturgeon.github.io/MemoryKeeper/
I use my wiki as a commonplace book. Every time I consider opening mine up, I consider the self-censorship likely to come from knowing that all of these half-baked thoughts will be public and decide that I gain more from my wiki by keeping it private. I've never liked my own conclusion, but I've never been able to argue myself out of it.
No doubt, I can empathize with your position (there are many risks). Some of my current interlocutors who write partially in public, [[sideria]] and [[Feel Good Lost]], have also explained a similar view. Keeping two sets of books, exporting what you've tagged "Public", can work. [[Anonymizing]] helps considerably, and keeping a low-profile is doable (especially because TW itself is never effectively indexed on any major search engine from what I can see, and I don't mind that one bit). Even password access may assist you in some cases (there are several ways to do this with TW, imho). Do you think others have more to gain from your keeping it even semi-public? How do you square that with what you have to gain? I think there's something to be said for having access even to the half-baked thoughts and processes of [[others]].