No.
> the Guardian's owners should publicly apologize to all their readers if they get anything wrong
What, you mean they should publish corrections and clarifications in an easy to see way:
https://www.theguardian.com/theguardian/series/correctionsan...
You mean they should be aware of their own history and publish that too:
https://www.theguardian.com/media/2021/may/12/guardian-200-t...
> I doubt they do.
Why doubt? Why not simply see for yourself.
It's hiding your mistakes because realistically 99% of the population who reads news doesn't care about the corrections.
Maybe you can issue some corrections and clarifications. Show us how it's done.
It's hiding your mistakes because realistically 99% of the population who reads news doesn't care about the corrections.