I'm sorry, but fittings don't just leak. It's not something that "just happens". A leaking fitting means a design or process flaw exists, and must be fixed, or the whole thing blows up again. It may not be interesting to you, but it's now very very interesting to every other team working at SpaceX, who just had all their shit blown to pieces. It's a (I hope this is obvious to you) critical component of the system, just as critical as, say, the control system and fuel pumps. Serious innovation may be required (yes, things like gaskets still involve PhD's), and was probably already required.

It's really interesting seeing software perspectives of a hardware world. A mech-e would have a stroke reading your comments.