.. reminds me of a depressurisation many decades ago in Oz. The senior ATC chap was absolutely adamant that his man convey to the crew the need to don their masks.
Needless to say, the initial considerations of the emergency were long sorted out by the time the ATC messages managed to get through the ATC system and, finally, to the crew.
As I recall .. the crew, having rolled their eyes into the back of their heads, tactfully and diplomatically acknowledged the concern of the senior ATC man and went on about their routine business sorting out the remainder of their problems at the time.
I think that there comes a point where success depends on the crew, the crew's competence and experience, and the operator's training programs ... and there is precious little that third parties can do considering communications realities and time pressures ...