Doubly so if you couldn’t find a relevant post in the first place.
It’s also a huge benefit for yourself. I have referred to posts I’ve written on topics many times over in the future. E.g I spent hours configuring rspamd (https://blog.mailpace.com/blog/how-to-catch-spam-with-rspamd...) or setting up html modules (https://blog.mailpace.com/blog/using-html-modules/). Both are super niche topics that I struggle to recall the details of without my blog posts.