Everything you suggest is in fact part of standard (and mandatory) procedures. If a pilot makes one serious error, you should look closely at the circumstances.

Everything you suggest is in fact part of standard (and mandatory) procedures. If a pilot makes one serious error, you should look closely at the circumstances. If the pilot makes ten in sequence, he probably is, as GP put it, a moron who shouldn't have been allowed near an airplane, ever. Circumstances do matter, but they do not constitute a general license to dismiss personal responsibility, especially in occupations known to come with very high responsibility.