Let’s stop with the hyperbole?
Covid can kill. Many thousands of people died.
IIRC at the time in question there were still mandatory health protocols in place for people to stay at home and isolate to prevent the spread. (I think they ended in October 2022?)
Multiple pilots, crew and other aviation workers entering isolation would have had a major impact on operations.
But still, that doesn’t address the ‘not telling’ aspect. But I think it is a valid reason for the ‘why’ [cancellations occurred or schedules could not be maintained]
