Writing is a good way to express your ideas and formalize what you are thinking. When you are sharing it with people, you open yourself up to scrutiny and pressure from the world, pushing you to think harder about the way you express ideas.

If you're uncomfortable with some stuff being shared and potentially being cancelled or used by an LLM or something, I think it's okay to shield. Shield things that are important to you and that you can't possibly have seen. Create everything else in public.

If it's not shared, what's the point of thought?