Most of this is about automated status pages, but it doesn't apply to status pages where the incident response team manually says "yes there is a problem" and "ok all problems are fixed".
True, but those teams have the same problem. How do they know it's really fixed, for every scenario, for everyone, everywhere?
They have a pretty good idea if something internal is broken, but it's very hard to know that everything is fixed.
That said, I agree that manually updated pages are generally more useful and accurate than automated ones. It's just an extra tax on the incident team.