No worries Bum - I didn't actually read you as suggesting I was gonzo and my mild defence of that is secondary to my main point: all processes have a risk associated and you manage that by either avoiding that process or paying attention to your process and carrying it out correctly. In the case of a leaking tap, you should be able to notice before it's 'too late', just as you should notice a bad seal on a lid.
It does involve an extra risk, no doubt, just one I feel is manageable with proper care taken when cubing. Racking to secondary I'd put likewise - do it properly and the risk is negligible. You also have to compare risk vs benefit and in both instances I wouldn't say the equation is massively weighted one way or the other, situation slightly dependent.
I rack every brew for bulk priming which is essentially racking every brew (used to rack for secondary ferm, rarely do now). There's a risk for sure. Do it properly and the risk is reduced/controlled. Have a reason for your process and make sure it's done properly. Forget shortcuts. Bob becomes a close relative.
Anyway good luck to yob - I have to drink his beer from time to time so it's in my interests that he gets it right.