The article presents the reason for the different adoption rates of anaesthesia and sterlization as visible versus invisible nature of problems. It seems to me that a better characterization would&#x27;ve been &quot;has a positive effect&quot; versus &quot;prevents a negative effect&quot;.  For an analogy, if some engineer had suggested that cockpit doors be reinforced in pre 9&#x2F;11 days, that voice would&#x27;ve drowned. If an engineer went ahead and implemented it anyway, that would&#x27;ve called for an enquiry into the additional cost, instead of rewarding the discovery and address of a vulnerability before its consequences hit people. Pilots who keep their cool in emergency situations can get into the news. What about those pilots who&#x27;ve flown again and again without errors? I think these are all related.