I am on the same page as @gentleshaid and @enforcer48. I am somewhat speechless and do not know what to write...
It is true that mistakes happen (we are humans after all, as you wrote). They however should always be reported (as most of them can be fixed). Similarly, responsibilities have to be taken. The latter is often hard, people preferring hiding than facing the consequences of their acts. This is at least something I have noticed here in France, also beyond healthcare.
PS: The fact that the medical personal is exhausted (especially after these two years of pandemic) is additionally not helping.