I don't think this is the same thing though, in their documentation the subdomain has to be for the owner or organization, so if it's `github.github.io` then it belongs to the `github` organization [1]

Though I guess I do get your point, meaning that this leads to people trusting the domain name if they are uneducated about how GitHub Pages works.

[1] https://docs.github.com/en/pages/getting-started-with-github...