ok465:
These procedures are all flight checked by people with 'real flying experience' before release, as well as 'flight validated' in a simulator even before the in-flight check using stringent guidelines that include checks at temperature and wind extremes.
They cannot, however, be checked for all possible specific RNAV system operational issues.
I think you mean to say that flight inspection cannot possibly check for possible errant blunders.
There is nothing wrong with the design of this procedure under FAA policy and design criteria.