I agree with the point that big companies have persuaded people that only they can offer ease of publishing content. most of my friends publish on Facebook, X, Instagram etc.

I have tried to get them to publish markdown sites using GitHub pages, but the pain of having to git commit and do it via desktop was the blocker.

So I recently made them a mobile app called JekyllPress [0] with which they can publish their posts similar to WordPress mobile app. And now a bunch of them regularly publish on GitHub pages. I think with more tools to simplify the publishing process, more people will start using GitHub pages (my app still requires some painful onboarding like creating a repo, enabling GitHub pages and getting PAT, no oAuth as I don't have any server).

[0] https://www.gapp.in/projects/jekyllpress/