Yeah sure. Writing is a way of structuring your thinking. Now whether you need to air that out to the public is a question of character. I tend to do 90% of writing purely for myself and need to force myself to write a blog post, for others that may differ.

Some of my favourite websites are weird 90s website where some weirdo decided to dedicate a website to their extremely obscure niche interest in way more detail than anybody would ever need.