My CV currently also includes a link to my repositories and a page briefly describing some projects that got anywhere. Far from all of my 100 or so personal free time projects get finished, but some do, and those are described and linked in my CV and on my website.
At least I do get interviews, which must mean at least something, and sometimes it's just the role that is not fitting. Often it is their tech stack and they do not believe in engineers learning things on the job, looking for a perfect match. Sometimes it was some test that they do, that presumes some knowledge about some library or that is some specific leetcode thingy, that I wouldn't code that way anyway, if I had the choice.
Imagine everyone having some cookie cutter blog, just a standard part of a resume.
Hacktober was the worst but I think it went away because of BS spam contributions.
CVE and in general security issues reporting has this issue nowadays where everyone wants to get CVE on their name to have it for CV. It is worst stuff ever.
I haven't been recruiting recently but goes it's even simpler to identify blogs full of loveless AI slop and people who care about a topic. (Even if they use AI for language assistance etc)
Topics, which details being presented, frequency, ...
In the past I got a job I had for 8 years through my blog, a startup that eventually sold....
So, it's been pretty good for me, and doesn't actually take that much extra effort on top of the learning you do daily working in tech.
For startups and small companies I think it makes a huge difference.
At one job I was told explicitly I was hired mostly because the hiring manager liked my website - I wasn't the only one that passed the interview process and so my website was why I was chosen. He liked how minimalist it was.
At another, one of the engineers found a bug on my website and my interview was to pair program a fix with him.
When I'm in charge of hiring I strongly prefer candidates that have some kind of web presence that lets me structure the interview more towards what they've presented about themselves.
Also I have gotten clients that originally found me because they googled "how to rent a motorcycle in Taiwan" and I rank #1 for that search apparently.
I intentionally made my website very minimalistic, using only HTML and CSS. Also fully responsive using modern CSS layouts and even made everything composable, avoiding media queries for specific widths. Kind of an experiment, but very minimalistic. So what you write makes me think: "If only someone took a look at my website and had that mindset!!"
Well, I will keep my website, maybe one day it will amount to something.
But… having (not so often updated) blog myself - I will try to change my behavior in future and mention it somehow during interview ;)
However, even at big companies it can be useful depending on context but you have to bring it up in relation to why you are a fit for the job. Genuine enthusiasm goes a long way especially in the dry corporate world.
I would actually prefer working in a startup again, where I can still influence technical implementation and guide things into good paths, compared to working as a tiny cog in a huge machinery of a big company. Of course, a lot depends on the team. It might be possible to be part of a great team in a big company, that is in charge of some aspect of the whole, and having more influence over how things are done there.