Good post K, erm has there ever been a time that you've shot in a local, say club competition and your scope fell off because you forgot to do up the mounts
Something else springs to mind too - people are too quick to blame their kit but very slow to admit that the fault might be the nut behind the butt pad.
We're not machines and we do have good days and bad days. If you're having a bad day, put the gun back in the bag and try again another day. Accept that you're human and very often the weak link in your shooting system.