If the "worth it" includes provable portfolio of skills, I don't know a better place than series of well-written blog posts.
Other "worth it" could be the development of your writing skills, documenting own learning path and so on. Maybe something can be even useful for you as well later on.
If you think "worth it" as a way to get attention, get job offers automatically e.g., likely not worth it unless it gets HN front page.
Note that anyone not living under a rock in 2025 would assume a significant probability that the articles in your blog are generated with an LLM, making it hardly a signal of skill.
I see your comment grayed out as if it was downvoted but this is 100% true and my colleagues share your sentiment. I still think writing is valuable (as is note-taking as a whole) for personal reasons but most people I know assume that most new professional content is LLM generated. Only if the writing is s*t we kind of believe that it was written by a human but that is also bad for obvious reasons.
I've had hn "front page" blog posts multiple times, and no I never got any job offers ;p
I think it’s more kind of a supportive role. Like a portfolio for an artist, it helps with marketing yourself to the other person. Like: “Yes, I know embedded programming, I even blogged about $PROJECT I did a while back”. Having something that can be independently verified and judged helps more that talking.