As an adjunct to your post, Lyman, the statistical probability of you or I getting on to a commercial air transport and arriving safely at our chosen destination is in the 99% + range.
That doesn't make 100% a valid expectation, or reality, nor does it make the tragic exception, like AF 447, any easier to swallow.
BOAC: to be fair, rogerg cuts to the meat of the matter, in terms of what one would expect as a standard means to deal with an instrument problem during IFR flight. Yes, it may be a bit reductionist in scope.
That said, when all of the Airspeed indications are Tangu Uniform, one is forced to use cross check and secondary scan for performance, getting out the checklists, and follow that with a methodical and sound crew response ... gee, we are back to a core point of his, that of
training.
A well
trained crew does these things.