There are two issues:
- Hosting a website is not so easy for the average person, even the tech savvy person, specially if you try to learn it now using the way large websites are developed.
- Static site blogs lack interactivity: people can't comment on your blog. You have to post a link to Twitter or HN (here!) and interact with people over there.
- Static site blogs also don't usually let people "subscribe" by email or whatnot, so unless people bookmark your website or follow you on Twitter, they are not going to find your content.
P.S. this is a problem area I'm trying to work on, at least on the technical front.
The counterpoint is that not having the ability to comment means that the author avoids the anxiety of not having anyone comment on their blog. Or worse still, having to filter out the negative comments.
No comments are normal if no one can comment.
Personally I've learnt that anxiety removal leads to a healthy life.
I would counter your three assertions with a few thoughts:
- there are now literally thousands of ways to host personal websites, even if we’re not in the LiveJournal age anymore
- there are also several services out there to host comments (many of which I tried over the years before I realized the absence of comments was a feature, not a bug)
- RSS is still a thing. Very much so. My site publishes a full RSS feed, and I have at least as many individual RSS GET requests as for the rest of my site, bar the homepage.