The current 'Safety Case' and 'Duty Holder' regime which governs this whole crisis has been misapplied. Utterly.
The key phrase is 'ALARP' - risks must be made As Low As Reasonably Practicable. The key word in this phrase is 'Reasonably.'
Bringing all flying to a halt is not a reasonable response, just a weak one from a Duty Holder who would rather not have the risk at all. There was a famous quote from a US military spokesman during the Vietnam War, who said something like 'we had to destroy the village in order to save it' - thus, the response to one challenge was to conflate it with a load of others.
And will someone please tell Comdt 2 FTS that 'cascade' is a noun and not a f###ing verb?