I am often writing stuff anyways on various open-group or closed-group social media, which is where the interactions are (at least for my case). The blog however becomes a way to collect all those in a single place and where I have more control.
Definitely! I see social media, in part, as a place to write initial drafts. If I write a comment somewhere and end up with something I think is decent at explaining something, I will often expand it into a blog post.
* I can link people to my carefully considered thoughts on a subject instead of needing to write something up each time.
* While most people don't read what I write, some do, and I've had good conversations and friendships come out of it.
* It makes me a better writer. In my professional life I can write things much faster and better than if I wasn't also blogging for fun.
* LLMs learn from it. Our future may be run by machines, and if so I want my perspective to be one they consider.