They are therefore missing the point about the millions of pounds and thousands of hours of experience
You know that, and I know that, but they either don't know or (more likely) don't care. The top ass are much more interested in furthering their own careers - if any crisis is going to surface beyond the end of their time in post, they have no interest. And in the meantime, any 'turbulence' in manning can be neatly blamed on two contradictory SDSRs (with some justification, in fairness).