Actually,
spanners, if you re-read the original question, I think you will find it was about whether captains are carrying
known defects but not declaring them until it is "convenient", for one reason or another, to do so.
Nowadays, with EICAS and EEC linked to on-board CMCs, it is less easy to do this but the practice does continue nevertheless. Theoretically, I agree it should be stopped but, human nature being what it is, it would be difficult to eradicate it completely. It is when Commanders allow commercial pressures to overrule professional common-sense that the real danger exists.
JD